diff --git a/build.gradle.kts b/build.gradle.kts
new file mode 100644
index 0000000..8406961
--- /dev/null
+++ b/build.gradle.kts
@@ -0,0 +1,20 @@
+plugins{
+    kotlin("jvm") version "2.0.20"
+}
+
+repositories{
+    mavenCentral()
+}
+
+val ktorVersion = "3.0.1"
+
+dependencies {
+    implementation("org.jetbrains.kotlinx:kotlinx-coroutines-core:1.9.0")
+
+    implementation("io.ktor:ktor-client-core:$ktorVersion")
+    implementation("io.ktor:ktor-client-cio:$ktorVersion")
+    implementation("io.ktor:ktor-client-core-jvm:3.0.1")
+    implementation("io.ktor:ktor-client-apache:3.0.1")
+
+    implementation("ch.qos.logback:logback-classic:1.5.12")
+}
\ No newline at end of file
diff --git a/notebooks/Multitasking.ipynb b/notebooks/Multitasking.ipynb
index 5c85e84..3278a8e 100644
--- a/notebooks/Multitasking.ipynb
+++ b/notebooks/Multitasking.ipynb
@@ -2,201 +2,267 @@
  "cells": [
   {
    "cell_type": "code",
-   "source": [
-    "%use coroutines"
-   ],
+   "execution_count": null,
    "metadata": {
     "datalore": {
-     "node_id": "Al3t64xqN0DN3JmLKHOVn2",
-     "type": "CODE",
      "hide_input_from_viewers": true,
-     "hide_output_from_viewers": true
+     "hide_output_from_viewers": true,
+     "node_id": "Al3t64xqN0DN3JmLKHOVn2",
+     "type": "CODE"
     }
    },
    "outputs": [],
-   "execution_count": null
+   "source": [
+    "%use coroutines"
+   ]
   },
   {
+   "cell_type": "markdown",
    "metadata": {},
-   "cell_type": "markdown",
-   "source": "# Три оси многозадачности"
+   "source": [
+    "# Три оси многозадачности"
+   ]
   },
   {
-   "cell_type": "markdown",
-   "source": "### Синхронный х однопоточный х неконкурентный ",
    "attachments": {},
+   "cell_type": "markdown",
    "metadata": {
     "datalore": {
-     "node_id": "TawmM9V8by8RGHfhNv7D3m",
-     "type": "MD",
      "hide_input_from_viewers": true,
-     "hide_output_from_viewers": true
+     "hide_output_from_viewers": true,
+     "node_id": "TawmM9V8by8RGHfhNv7D3m",
+     "type": "MD"
     }
-   }
+   },
+   "source": [
+    "### Синхронный х однопоточный х неконкурентный "
+   ]
   },
   {
    "cell_type": "code",
+   "execution_count": null,
+   "metadata": {
+    "datalore": {
+     "hide_input_from_viewers": true,
+     "hide_output_from_viewers": true,
+     "node_id": "XzjwoelmODMg8pmaJRe1KK",
+     "type": "CODE"
+    }
+   },
+   "outputs": [],
    "source": [
     "repeat(10){\n",
     "    println(\"Line number $it\")\n",
     "}"
-   ],
-   "metadata": {
-    "datalore": {
-     "node_id": "XzjwoelmODMg8pmaJRe1KK",
-     "type": "CODE",
-     "hide_input_from_viewers": true,
-     "hide_output_from_viewers": true
-    }
-   },
-   "outputs": [],
-   "execution_count": null
+   ]
   },
   {
    "cell_type": "code",
+   "execution_count": null,
+   "metadata": {
+    "datalore": {
+     "hide_input_from_viewers": true,
+     "hide_output_from_viewers": true,
+     "node_id": "UuTmCNAMCpUAHaAwWVYJPy",
+     "type": "CODE"
+    }
+   },
+   "outputs": [],
    "source": [
     "import java.util.stream.*\n",
     "\n",
     "IntStream.range(0, 100).sum()"
-   ],
-   "metadata": {
-    "datalore": {
-     "node_id": "UuTmCNAMCpUAHaAwWVYJPy",
-     "type": "CODE",
-     "hide_input_from_viewers": true,
-     "hide_output_from_viewers": true
-    }
-   },
-   "outputs": [],
-   "execution_count": null
+   ]
   },
   {
-   "cell_type": "markdown",
-   "source": "### Синхронный х однопоточный х конкурентный",
    "attachments": {},
+   "cell_type": "markdown",
    "metadata": {
     "datalore": {
-     "node_id": "f6DGHwBOIRvKuYjtxVRn0W",
-     "type": "MD",
      "hide_input_from_viewers": true,
-     "hide_output_from_viewers": true
+     "hide_output_from_viewers": true,
+     "node_id": "f6DGHwBOIRvKuYjtxVRn0W",
+     "type": "MD"
     }
-   }
+   },
+   "source": [
+    "### Синхронный х однопоточный х конкурентный"
+   ]
   },
   {
    "cell_type": "code",
+   "execution_count": 1,
+   "metadata": {
+    "datalore": {
+     "hide_input_from_viewers": true,
+     "hide_output_from_viewers": true,
+     "node_id": "O1DPfMSAedOChaqU5JWXrU",
+     "type": "CODE"
+    }
+   },
+   "outputs": [
+    {
+     "name": "stderr",
+     "output_type": "stream",
+     "text": [
+      "null\n",
+      "java.util.ConcurrentModificationException\n",
+      "\tat java.base/java.util.ArrayList$Itr.checkForComodification(ArrayList.java:1095)\n",
+      "\tat java.base/java.util.ArrayList$Itr.next(ArrayList.java:1049)\n",
+      "\tat Line_0_jupyter.<init>(Line_0.jupyter.kts:6)\n",
+      "\tat java.base/jdk.internal.reflect.DirectConstructorHandleAccessor.newInstance(DirectConstructorHandleAccessor.java:62)\n",
+      "\tat java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:502)\n",
+      "\tat java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:486)\n",
+      "\tat kotlin.script.experimental.jvm.BasicJvmScriptEvaluator.evalWithConfigAndOtherScriptsResults(BasicJvmScriptEvaluator.kt:122)\n",
+      "\tat kotlin.script.experimental.jvm.BasicJvmScriptEvaluator.invoke$suspendImpl(BasicJvmScriptEvaluator.kt:48)\n",
+      "\tat kotlin.script.experimental.jvm.BasicJvmScriptEvaluator.invoke(BasicJvmScriptEvaluator.kt)\n",
+      "\tat kotlin.script.experimental.jvm.BasicJvmReplEvaluator.eval(BasicJvmReplEvaluator.kt:49)\n",
+      "\tat org.jetbrains.kotlinx.jupyter.repl.impl.InternalEvaluatorImpl$eval$resultWithDiagnostics$1.invokeSuspend(InternalEvaluatorImpl.kt:127)\n",
+      "\tat kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)\n",
+      "\tat kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:104)\n",
+      "\tat kotlinx.coroutines.EventLoopImplBase.processNextEvent(EventLoop.common.kt:277)\n",
+      "\tat kotlinx.coroutines.BlockingCoroutine.joinBlocking(Builders.kt:95)\n",
+      "\tat kotlinx.coroutines.BuildersKt__BuildersKt.runBlocking(Builders.kt:69)\n",
+      "\tat kotlinx.coroutines.BuildersKt.runBlocking(Unknown Source)\n",
+      "\tat kotlinx.coroutines.BuildersKt__BuildersKt.runBlocking$default(Builders.kt:48)\n",
+      "\tat kotlinx.coroutines.BuildersKt.runBlocking$default(Unknown Source)\n",
+      "\tat org.jetbrains.kotlinx.jupyter.repl.impl.InternalEvaluatorImpl.eval(InternalEvaluatorImpl.kt:127)\n",
+      "\tat org.jetbrains.kotlinx.jupyter.repl.impl.CellExecutorImpl$execute$1$result$1.invoke(CellExecutorImpl.kt:79)\n",
+      "\tat org.jetbrains.kotlinx.jupyter.repl.impl.CellExecutorImpl$execute$1$result$1.invoke(CellExecutorImpl.kt:77)\n",
+      "\tat org.jetbrains.kotlinx.jupyter.repl.impl.ReplForJupyterImpl.withHost(ReplForJupyterImpl.kt:758)\n",
+      "\tat org.jetbrains.kotlinx.jupyter.repl.impl.CellExecutorImpl.execute(CellExecutorImpl.kt:77)\n",
+      "\tat org.jetbrains.kotlinx.jupyter.repl.execution.CellExecutor$DefaultImpls.execute$default(CellExecutor.kt:12)\n",
+      "\tat org.jetbrains.kotlinx.jupyter.repl.impl.ReplForJupyterImpl.evaluateUserCode(ReplForJupyterImpl.kt:581)\n",
+      "\tat org.jetbrains.kotlinx.jupyter.repl.impl.ReplForJupyterImpl.access$evaluateUserCode(ReplForJupyterImpl.kt:136)\n",
+      "\tat org.jetbrains.kotlinx.jupyter.repl.impl.ReplForJupyterImpl$evalEx$1.invoke(ReplForJupyterImpl.kt:439)\n",
+      "\tat org.jetbrains.kotlinx.jupyter.repl.impl.ReplForJupyterImpl$evalEx$1.invoke(ReplForJupyterImpl.kt:436)\n",
+      "\tat org.jetbrains.kotlinx.jupyter.repl.impl.ReplForJupyterImpl.withEvalContext(ReplForJupyterImpl.kt:417)\n",
+      "\tat org.jetbrains.kotlinx.jupyter.repl.impl.ReplForJupyterImpl.evalEx(ReplForJupyterImpl.kt:436)\n",
+      "\tat org.jetbrains.kotlinx.jupyter.messaging.IdeCompatibleMessageRequestProcessor$processExecuteRequest$1$response$1$1.invoke(IdeCompatibleMessageRequestProcessor.kt:140)\n",
+      "\tat org.jetbrains.kotlinx.jupyter.messaging.IdeCompatibleMessageRequestProcessor$processExecuteRequest$1$response$1$1.invoke(IdeCompatibleMessageRequestProcessor.kt:139)\n",
+      "\tat org.jetbrains.kotlinx.jupyter.execution.JupyterExecutorImpl$Task.execute(JupyterExecutorImpl.kt:42)\n",
+      "\tat org.jetbrains.kotlinx.jupyter.execution.JupyterExecutorImpl$executorThread$1.invoke(JupyterExecutorImpl.kt:82)\n",
+      "\tat org.jetbrains.kotlinx.jupyter.execution.JupyterExecutorImpl$executorThread$1.invoke(JupyterExecutorImpl.kt:80)\n",
+      "\tat kotlin.concurrent.ThreadsKt$thread$thread$1.run(Thread.kt:30)\n"
+     ]
+    }
+   ],
    "source": [
     "val list = (0..100).toMutableList()\n",
     "\n",
-    "list.forEach{\n",
+    "list.forEach {\n",
     "    if(it % 2 == 0) list.remove(it)\n",
     "}"
-   ],
-   "metadata": {
-    "datalore": {
-     "node_id": "O1DPfMSAedOChaqU5JWXrU",
-     "type": "CODE",
-     "hide_input_from_viewers": true,
-     "hide_output_from_viewers": true
-    }
-   },
-   "outputs": [],
-   "execution_count": null
+   ]
   },
   {
    "cell_type": "code",
-   "source": [],
+   "execution_count": null,
    "metadata": {
     "datalore": {
+     "hide_input_from_viewers": true,
+     "hide_output_from_viewers": true,
      "node_id": "N3QIwvANEngnvMgsCVJatN",
-     "type": "CODE",
-     "hide_input_from_viewers": true,
-     "hide_output_from_viewers": true
+     "type": "CODE"
     }
    },
    "outputs": [],
-   "execution_count": null
+   "source": []
   },
   {
-   "cell_type": "markdown",
-   "source": "### Синхронный х многопоточный х неконкурентный",
    "attachments": {},
+   "cell_type": "markdown",
    "metadata": {
     "datalore": {
-     "node_id": "x9nGAXOgOlWxd4cu6Smio8",
-     "type": "MD",
      "hide_input_from_viewers": true,
-     "hide_output_from_viewers": true
+     "hide_output_from_viewers": true,
+     "node_id": "x9nGAXOgOlWxd4cu6Smio8",
+     "type": "MD"
     }
-   }
+   },
+   "source": [
+    "### Синхронный х многопоточный х неконкурентный"
+   ]
   },
   {
    "cell_type": "code",
+   "execution_count": null,
+   "metadata": {
+    "datalore": {
+     "hide_input_from_viewers": true,
+     "hide_output_from_viewers": true,
+     "node_id": "lRJGB0cHhpjQTdRdGynG0G",
+     "type": "CODE"
+    }
+   },
+   "outputs": [],
    "source": [
     "val sum = IntStream.range(0, 100).parallel().sum()\n",
     "\n",
     "println(sum)"
-   ],
-   "metadata": {
-    "datalore": {
-     "node_id": "lRJGB0cHhpjQTdRdGynG0G",
-     "type": "CODE",
-     "hide_input_from_viewers": true,
-     "hide_output_from_viewers": true
-    }
-   },
-   "outputs": [],
-   "execution_count": null
+   ]
   },
   {
    "cell_type": "code",
-   "source": [],
+   "execution_count": null,
    "metadata": {
     "datalore": {
+     "hide_input_from_viewers": true,
+     "hide_output_from_viewers": true,
      "node_id": "1lLEGWWbB6qnFr1qjfSGpo",
-     "type": "CODE",
-     "hide_input_from_viewers": true,
-     "hide_output_from_viewers": true
+     "type": "CODE"
     }
    },
    "outputs": [],
-   "execution_count": null
+   "source": []
   },
   {
-   "cell_type": "markdown",
-   "source": "### Асинхронный х однопоточный х неконкурентный",
    "attachments": {},
+   "cell_type": "markdown",
    "metadata": {
     "datalore": {
-     "node_id": "OTRLxfWLADkMoc9ViJfeEq",
-     "type": "MD",
      "hide_input_from_viewers": true,
-     "hide_output_from_viewers": true
+     "hide_output_from_viewers": true,
+     "node_id": "OTRLxfWLADkMoc9ViJfeEq",
+     "type": "MD"
     }
-   }
+   },
+   "source": [
+    "### Асинхронный х однопоточный х неконкурентный"
+   ]
   },
   {
    "cell_type": "code",
+   "execution_count": null,
+   "metadata": {
+    "datalore": {
+     "hide_input_from_viewers": true,
+     "hide_output_from_viewers": true,
+     "node_id": "r1yVVtgMhexxzx7gGVmeIg",
+     "type": "CODE"
+    }
+   },
+   "outputs": [],
    "source": [
     "fun runLongTask(result: Int = 8): Int {\n",
     "  Thread.sleep(100)\n",
     "  println(\"Task complete: $result\")\n",
     "  return result\n",
     "}"
-   ],
-   "metadata": {
-    "datalore": {
-     "node_id": "r1yVVtgMhexxzx7gGVmeIg",
-     "type": "CODE",
-     "hide_input_from_viewers": true,
-     "hide_output_from_viewers": true
-    }
-   },
-   "outputs": [],
-   "execution_count": null
+   ]
   },
   {
    "cell_type": "code",
+   "execution_count": null,
+   "metadata": {
+    "datalore": {
+     "hide_input_from_viewers": true,
+     "hide_output_from_viewers": true,
+     "node_id": "8YvIKfD1I7cfbiPRMpk0DC",
+     "type": "CODE"
+    }
+   },
+   "outputs": [],
    "source": [
     "import java.util.concurrent.*\n",
     "\n",
@@ -209,100 +275,104 @@
     "}\n",
     "\n",
     "future.get()"
-   ],
-   "metadata": {
-    "datalore": {
-     "node_id": "8YvIKfD1I7cfbiPRMpk0DC",
-     "type": "CODE",
-     "hide_input_from_viewers": true,
-     "hide_output_from_viewers": true
-    }
-   },
-   "outputs": [],
-   "execution_count": null
+   ]
   },
   {
-   "cell_type": "markdown",
-   "source": "### Асинхронный х однопоточный х конкурентный ",
    "attachments": {},
+   "cell_type": "markdown",
    "metadata": {
     "datalore": {
-     "node_id": "nyjKPayaltq8gBzq2bIP1c",
-     "type": "MD",
      "hide_input_from_viewers": true,
-     "hide_output_from_viewers": true
+     "hide_output_from_viewers": true,
+     "node_id": "nyjKPayaltq8gBzq2bIP1c",
+     "type": "MD"
     }
-   }
+   },
+   "source": [
+    "### Асинхронный х однопоточный х конкурентный "
+   ]
   },
   {
    "cell_type": "code",
+   "execution_count": null,
+   "metadata": {
+    "datalore": {
+     "hide_input_from_viewers": true,
+     "hide_output_from_viewers": true,
+     "node_id": "UreOIHJpXQYfkjeHOvf1Bq",
+     "type": "CODE"
+    }
+   },
+   "outputs": [],
    "source": [
     "interface Observable{\n",
     "    fun onChange(callback: (Int) -> Unit)\n",
     "}\n",
     "\n",
     "val observable: Observable by lazy{ TODO() }"
-   ],
-   "metadata": {
-    "datalore": {
-     "node_id": "UreOIHJpXQYfkjeHOvf1Bq",
-     "type": "CODE",
-     "hide_input_from_viewers": true,
-     "hide_output_from_viewers": true
-    }
-   },
-   "outputs": [],
-   "execution_count": null
+   ]
   },
   {
    "cell_type": "code",
+   "execution_count": null,
+   "metadata": {
+    "datalore": {
+     "hide_input_from_viewers": true,
+     "hide_output_from_viewers": true,
+     "node_id": "1in8iE7mL9m895XWUNh0Sl",
+     "type": "CODE"
+    }
+   },
+   "outputs": [],
    "source": [
     "val list: MutableList<Int> = mutableListOf<Int>()\n",
     "\n",
     "observable.onChange { \n",
     "    list.add(it)\n",
     "}"
-   ],
-   "metadata": {
-    "datalore": {
-     "node_id": "1in8iE7mL9m895XWUNh0Sl",
-     "type": "CODE",
-     "hide_input_from_viewers": true,
-     "hide_output_from_viewers": true
-    }
-   },
-   "outputs": [],
-   "execution_count": null
+   ]
   },
   {
-   "cell_type": "markdown",
-   "source": "### Асинхронный х многопоточный х неконкурентный",
    "attachments": {},
+   "cell_type": "markdown",
    "metadata": {
     "datalore": {
-     "node_id": "TczpOZrkCKogcT7x7XWAUT",
-     "type": "MD",
      "hide_input_from_viewers": true,
-     "hide_output_from_viewers": true
+     "hide_output_from_viewers": true,
+     "node_id": "TczpOZrkCKogcT7x7XWAUT",
+     "type": "MD"
     }
-   }
+   },
+   "source": [
+    "### Асинхронный х многопоточный х неконкурентный"
+   ]
   },
   {
    "cell_type": "code",
-   "source": [],
+   "execution_count": null,
    "metadata": {
     "datalore": {
-     "node_id": "YvgL8fFuneP9USjjnsfiQj",
-     "type": "CODE",
      "hide_input_from_viewers": true,
-     "hide_output_from_viewers": true
+     "hide_output_from_viewers": true,
+     "node_id": "YvgL8fFuneP9USjjnsfiQj",
+     "type": "CODE"
     }
    },
    "outputs": [],
-   "execution_count": null
+   "source": []
   },
   {
    "cell_type": "code",
+   "execution_count": null,
+   "metadata": {
+    "datalore": {
+     "hide_input_from_viewers": true,
+     "hide_output_from_viewers": true,
+     "node_id": "9NS1h5b5lJ0BEzieUt6xrr",
+     "type": "CODE"
+    }
+   },
+   "outputs": [],
    "source": [
     "val executor: ExecutorService = Executors.newFixedThreadPool(4)\n",
     "\n",
@@ -311,33 +381,35 @@
     "        runLongTask(it)\n",
     "    }\n",
     "}"
-   ],
-   "metadata": {
-    "datalore": {
-     "node_id": "9NS1h5b5lJ0BEzieUt6xrr",
-     "type": "CODE",
-     "hide_input_from_viewers": true,
-     "hide_output_from_viewers": true
-    }
-   },
-   "outputs": [],
-   "execution_count": null
+   ]
   },
   {
-   "cell_type": "markdown",
-   "source": "### Синхронный х многопоточный х конкурентный",
    "attachments": {},
+   "cell_type": "markdown",
    "metadata": {
     "datalore": {
-     "node_id": "REBgToVc8iKIrODCWXPdZj",
-     "type": "MD",
      "hide_input_from_viewers": true,
-     "hide_output_from_viewers": true
+     "hide_output_from_viewers": true,
+     "node_id": "REBgToVc8iKIrODCWXPdZj",
+     "type": "MD"
     }
-   }
+   },
+   "source": [
+    "### Синхронный х многопоточный х конкурентный"
+   ]
   },
   {
    "cell_type": "code",
+   "execution_count": null,
+   "metadata": {
+    "datalore": {
+     "hide_input_from_viewers": true,
+     "hide_output_from_viewers": true,
+     "node_id": "3AjItM8WtjFE9qJo9JvZFW",
+     "type": "CODE"
+    }
+   },
+   "outputs": [],
    "source": [
     "import kotlin.io.path.Path\n",
     "import kotlin.io.path.writeText\n",
@@ -351,33 +423,35 @@
     "    .forEach {  \n",
     "        file.writeText(it)\n",
     "    }"
-   ],
-   "metadata": {
-    "datalore": {
-     "node_id": "3AjItM8WtjFE9qJo9JvZFW",
-     "type": "CODE",
-     "hide_input_from_viewers": true,
-     "hide_output_from_viewers": true
-    }
-   },
-   "outputs": [],
-   "execution_count": null
+   ]
   },
   {
-   "cell_type": "markdown",
-   "source": "### Асинхронный х многопоточный х конкурентный",
    "attachments": {},
+   "cell_type": "markdown",
    "metadata": {
     "datalore": {
-     "node_id": "XDCp5EjIq8v6ABeo5q2K6S",
-     "type": "MD",
      "hide_input_from_viewers": true,
-     "hide_output_from_viewers": true
+     "hide_output_from_viewers": true,
+     "node_id": "XDCp5EjIq8v6ABeo5q2K6S",
+     "type": "MD"
     }
-   }
+   },
+   "source": [
+    "### Асинхронный х многопоточный х конкурентный"
+   ]
   },
   {
    "cell_type": "code",
+   "execution_count": null,
+   "metadata": {
+    "datalore": {
+     "hide_input_from_viewers": true,
+     "hide_output_from_viewers": true,
+     "node_id": "taOKUd5Gc9U6TuGVFZJvew",
+     "type": "CODE"
+    }
+   },
+   "outputs": [],
    "source": [
     "val cache = mutableMapOf<Int, Int>\n",
     "\n",
@@ -392,50 +466,50 @@
     "        consumer(result)\n",
     "    }\n",
     "}"
-   ],
+   ]
+  },
+  {
+   "attachments": {},
+   "cell_type": "markdown",
    "metadata": {
     "datalore": {
-     "node_id": "taOKUd5Gc9U6TuGVFZJvew",
-     "type": "CODE",
      "hide_input_from_viewers": true,
-     "hide_output_from_viewers": true
+     "hide_output_from_viewers": true,
+     "node_id": "bSK4aInljsXYinbOTNSLdc",
+     "type": "MD"
     }
    },
-   "outputs": [],
-   "execution_count": null
-  },
-  {
-   "cell_type": "markdown",
    "source": [
     "## Инструменты"
-   ],
-   "attachments": {},
-   "metadata": {
-    "datalore": {
-     "node_id": "bSK4aInljsXYinbOTNSLdc",
-     "type": "MD",
-     "hide_input_from_viewers": true,
-     "hide_output_from_viewers": true
-    }
-   }
+   ]
   },
   {
-   "cell_type": "markdown",
-   "source": [
-    "#### Thread"
-   ],
    "attachments": {},
+   "cell_type": "markdown",
    "metadata": {
     "datalore": {
-     "node_id": "qjWpglMy3eSM475ozgnDPA",
-     "type": "MD",
      "hide_input_from_viewers": true,
-     "hide_output_from_viewers": true
+     "hide_output_from_viewers": true,
+     "node_id": "qjWpglMy3eSM475ozgnDPA",
+     "type": "MD"
     }
-   }
+   },
+   "source": [
+    "#### Thread"
+   ]
   },
   {
    "cell_type": "code",
+   "execution_count": null,
+   "metadata": {
+    "datalore": {
+     "hide_input_from_viewers": true,
+     "hide_output_from_viewers": true,
+     "node_id": "nEZ6jKJhVHhsjMvptTQ3rU",
+     "type": "CODE"
+    }
+   },
+   "outputs": [],
    "source": [
     "import kotlin.concurrent.*\n",
     "\n",
@@ -443,49 +517,49 @@
     "    runLongTask()\n",
     "}\n",
     "t.join()"
-   ],
-   "metadata": {
-    "datalore": {
-     "node_id": "nEZ6jKJhVHhsjMvptTQ3rU",
-     "type": "CODE",
-     "hide_input_from_viewers": true,
-     "hide_output_from_viewers": true
-    }
-   },
-   "outputs": [],
-   "execution_count": null
+   ]
   },
   {
    "cell_type": "code",
-   "source": [],
+   "execution_count": null,
    "metadata": {
     "datalore": {
-     "node_id": "k35GcE4VUIMtrznZ0C3BmC",
-     "type": "CODE",
      "hide_input_from_viewers": true,
-     "hide_output_from_viewers": true
+     "hide_output_from_viewers": true,
+     "node_id": "k35GcE4VUIMtrznZ0C3BmC",
+     "type": "CODE"
     }
    },
    "outputs": [],
-   "execution_count": null
+   "source": []
   },
   {
+   "attachments": {},
    "cell_type": "markdown",
+   "metadata": {
+    "datalore": {
+     "hide_input_from_viewers": true,
+     "hide_output_from_viewers": true,
+     "node_id": "bX0GaqyAH6q7Max0Tky7DW",
+     "type": "MD"
+    }
+   },
    "source": [
     "#### Future"
-   ],
-   "attachments": {},
-   "metadata": {
-    "datalore": {
-     "node_id": "bX0GaqyAH6q7Max0Tky7DW",
-     "type": "MD",
-     "hide_input_from_viewers": true,
-     "hide_output_from_viewers": true
-    }
-   }
+   ]
   },
   {
    "cell_type": "code",
+   "execution_count": null,
+   "metadata": {
+    "datalore": {
+     "hide_input_from_viewers": true,
+     "hide_output_from_viewers": true,
+     "node_id": "TVhCm0JtWiYFFqWYORxuya",
+     "type": "CODE"
+    }
+   },
+   "outputs": [],
    "source": [
     "val future = executor.submit<Int>{\n",
     "    runLongTask()\n",
@@ -493,35 +567,35 @@
     "\n",
     "future.get()\n",
     "future.cancel(true)"
-   ],
-   "metadata": {
-    "datalore": {
-     "node_id": "TVhCm0JtWiYFFqWYORxuya",
-     "type": "CODE",
-     "hide_input_from_viewers": true,
-     "hide_output_from_viewers": true
-    }
-   },
-   "outputs": [],
-   "execution_count": null
+   ]
   },
   {
-   "cell_type": "markdown",
-   "source": [
-    "#### CompletableFuture"
-   ],
    "attachments": {},
+   "cell_type": "markdown",
    "metadata": {
     "datalore": {
-     "node_id": "a5BY9U8m9OeZSSsS0yGRSZ",
-     "type": "MD",
      "hide_input_from_viewers": true,
-     "hide_output_from_viewers": true
+     "hide_output_from_viewers": true,
+     "node_id": "a5BY9U8m9OeZSSsS0yGRSZ",
+     "type": "MD"
     }
-   }
+   },
+   "source": [
+    "#### CompletableFuture"
+   ]
   },
   {
    "cell_type": "code",
+   "execution_count": null,
+   "metadata": {
+    "datalore": {
+     "hide_input_from_viewers": true,
+     "hide_output_from_viewers": true,
+     "node_id": "2rchFZt5trGqzOCuU3aPvz",
+     "type": "CODE"
+    }
+   },
+   "outputs": [],
    "source": [
     "import java.util.concurrent.*\n",
     "\n",
@@ -539,35 +613,35 @@
     "\n",
     "cf2.join()\n",
     "cf3.join()"
-   ],
-   "metadata": {
-    "datalore": {
-     "node_id": "2rchFZt5trGqzOCuU3aPvz",
-     "type": "CODE",
-     "hide_input_from_viewers": true,
-     "hide_output_from_viewers": true
-    }
-   },
-   "outputs": [],
-   "execution_count": null
+   ]
   },
   {
-   "cell_type": "markdown",
-   "source": [
-    "#### Lock"
-   ],
    "attachments": {},
+   "cell_type": "markdown",
    "metadata": {
     "datalore": {
-     "node_id": "izHWuE5ZZo1hphjMmc7BHj",
-     "type": "MD",
      "hide_input_from_viewers": true,
-     "hide_output_from_viewers": true
+     "hide_output_from_viewers": true,
+     "node_id": "izHWuE5ZZo1hphjMmc7BHj",
+     "type": "MD"
     }
-   }
+   },
+   "source": [
+    "#### Lock"
+   ]
   },
   {
    "cell_type": "code",
+   "execution_count": null,
+   "metadata": {
+    "datalore": {
+     "hide_input_from_viewers": true,
+     "hide_output_from_viewers": true,
+     "node_id": "JTXxcGnvTS36OVX6GkJfkK",
+     "type": "CODE"
+    }
+   },
+   "outputs": [],
    "source": [
     "import java.util.concurrent.locks.*\n",
     "\n",
@@ -592,26 +666,20 @@
     "cf5.join()\n",
     "\n",
     "list"
-   ],
-   "metadata": {
-    "datalore": {
-     "node_id": "JTXxcGnvTS36OVX6GkJfkK",
-     "type": "CODE",
-     "hide_input_from_viewers": true,
-     "hide_output_from_viewers": true
-    }
-   },
-   "outputs": [],
-   "execution_count": null
+   ]
   },
   {
-   "metadata": {},
    "cell_type": "markdown",
-   "source": "Reactive streams"
+   "metadata": {},
+   "source": [
+    "Reactive streams"
+   ]
   },
   {
-   "metadata": {},
    "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
    "source": [
     "class A(val value: Int)\n",
     "class B(val value: Int)\n",
@@ -622,18 +690,20 @@
     "val combined = aFlow.zip(bFlow){ a, b->\n",
     "    a.value + b.value\n",
     "}.debounce(2.seconds)"
-   ],
-   "outputs": [],
-   "execution_count": null
+   ]
   },
   {
-   "metadata": {},
    "cell_type": "markdown",
-   "source": "Actor"
+   "metadata": {},
+   "source": [
+    "Actor"
+   ]
   },
   {
-   "metadata": {},
    "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
    "source": [
     "sealed class Event {\n",
     "    class Open(val transactionId: Int): Event()\n",
@@ -662,42 +732,50 @@
     "    }\n",
     "\n",
     "}"
-   ],
-   "outputs": [],
-   "execution_count": null
+   ]
   },
   {
+   "attachments": {},
    "cell_type": "markdown",
+   "metadata": {
+    "datalore": {
+     "hide_input_from_viewers": true,
+     "hide_output_from_viewers": true,
+     "node_id": "YDqoXAD2XEED9MSPRuMMzL",
+     "type": "MD"
+    }
+   },
    "source": [
     "## Сорта асинхронности"
-   ],
-   "attachments": {},
-   "metadata": {
-    "datalore": {
-     "node_id": "YDqoXAD2XEED9MSPRuMMzL",
-     "type": "MD",
-     "hide_input_from_viewers": true,
-     "hide_output_from_viewers": true
-    }
-   }
+   ]
   },
   {
-   "cell_type": "markdown",
-   "source": [
-    "#### Callback"
-   ],
    "attachments": {},
+   "cell_type": "markdown",
    "metadata": {
     "datalore": {
-     "node_id": "kb1ccsTMIZX3aacLF6gPrJ",
-     "type": "MD",
      "hide_input_from_viewers": true,
-     "hide_output_from_viewers": true
+     "hide_output_from_viewers": true,
+     "node_id": "kb1ccsTMIZX3aacLF6gPrJ",
+     "type": "MD"
     }
-   }
+   },
+   "source": [
+    "#### Callback"
+   ]
   },
   {
    "cell_type": "code",
+   "execution_count": null,
+   "metadata": {
+    "datalore": {
+     "hide_input_from_viewers": true,
+     "hide_output_from_viewers": true,
+     "node_id": "jZrkouEiPJnMCCpxTFlgVP",
+     "type": "CODE"
+    }
+   },
+   "outputs": [],
    "source": [
     "import java.net.*\n",
     "import java.net.http.*\n",
@@ -729,61 +807,60 @@
     "    }\n",
     "    .thenAccept{ println(it.toList()) }\n",
     "    .join()"
-   ],
-   "metadata": {
-    "datalore": {
-     "node_id": "jZrkouEiPJnMCCpxTFlgVP",
-     "type": "CODE",
-     "hide_input_from_viewers": true,
-     "hide_output_from_viewers": true
-    }
-   },
-   "outputs": [],
-   "execution_count": null
+   ]
   },
   {
-   "cell_type": "markdown",
-   "source": [
-    "#### Реактивные потоки"
-   ],
    "attachments": {},
+   "cell_type": "markdown",
    "metadata": {
     "datalore": {
-     "node_id": "7zwURNaHnaTgOTAZumDDcd",
-     "type": "MD",
      "hide_input_from_viewers": true,
-     "hide_output_from_viewers": true
+     "hide_output_from_viewers": true,
+     "node_id": "7zwURNaHnaTgOTAZumDDcd",
+     "type": "MD"
     }
-   }
+   },
+   "source": [
+    "#### Реактивные потоки"
+   ]
   },
   {
    "cell_type": "code",
-   "source": [],
+   "execution_count": null,
    "metadata": {
     "datalore": {
-     "node_id": "lPXl5Gkvu7CuhlhUV7YJab",
-     "type": "CODE",
      "hide_input_from_viewers": true,
-     "hide_output_from_viewers": true
+     "hide_output_from_viewers": true,
+     "node_id": "lPXl5Gkvu7CuhlhUV7YJab",
+     "type": "CODE"
     }
    },
    "outputs": [],
-   "execution_count": null
+   "source": []
   }
  ],
  "metadata": {
+  "datalore": {
+   "base_environment": "default",
+   "computation_mode": "JUPYTER",
+   "package_manager": "pip",
+   "packages": [],
+   "report_row_ids": [],
+   "version": 3
+  },
   "kernelspec": {
    "display_name": "Kotlin",
    "language": "kotlin",
    "name": "kotlin"
   },
-  "datalore": {
-   "computation_mode": "JUPYTER",
-   "package_manager": "pip",
-   "base_environment": "default",
-   "packages": [],
-   "report_row_ids": [],
-   "version": 3
+  "language_info": {
+   "codemirror_mode": "text/x-kotlin",
+   "file_extension": ".kt",
+   "mimetype": "text/x-kotlin",
+   "name": "kotlin",
+   "nbconvert_exporter": "",
+   "pygments_lexer": "kotlin",
+   "version": "1.9.23"
   }
  },
  "nbformat": 4,
diff --git a/src/main/kotlin/javaHttpClient.kt b/src/main/kotlin/javaHttpClient.kt
new file mode 100644
index 0000000..f1b5446
--- /dev/null
+++ b/src/main/kotlin/javaHttpClient.kt
@@ -0,0 +1,34 @@
+import java.net.*
+import java.net.http.*
+import java.net.http.HttpResponse.*
+
+fun main() {
+    val client: HttpClient = HttpClient.newHttpClient()
+
+    val request :  HttpRequest = HttpRequest.newBuilder()
+        .uri(URI.create("https://sciprog.center"))
+        .GET().build()
+
+    val regex = """href=\"(.+\.png)\"""".toRegex()
+
+    client.sendAsync(request, BodyHandlers.ofString())
+        .thenApply{ it.body() }
+        .thenApply{
+            val resources = regex.findAll(it).map{it.groupValues[1]}
+
+            resources.map { resourceName->
+                println("Resource processing for $resourceName started")
+                val resourceRequest :  HttpRequest = HttpRequest.newBuilder()
+                    .uri(URI.create("https://sciprog.center$resourceName"))
+                    .GET().build()
+                client.sendAsync(resourceRequest, BodyHandlers.ofByteArray()).thenAccept{ resourceResponse ->
+                    val bodyBytes = resourceResponse.body()
+                    //do something with the body
+                    println("The resource with name $resourceName has ${bodyBytes.size} bytes")
+                }
+            }
+            resources
+        }
+        .thenAccept{ println(it.toList()) }
+        .join()
+}
\ No newline at end of file
diff --git a/src/main/kotlin/ktorClient.kt b/src/main/kotlin/ktorClient.kt
new file mode 100644
index 0000000..8eeaf4b
--- /dev/null
+++ b/src/main/kotlin/ktorClient.kt
@@ -0,0 +1,26 @@
+import io.ktor.client.HttpClient
+import io.ktor.client.call.body
+import io.ktor.client.engine.cio.CIO
+import io.ktor.client.request.get
+import io.ktor.client.statement.bodyAsBytes
+import io.ktor.client.statement.bodyAsText
+import kotlinx.coroutines.coroutineScope
+import kotlinx.coroutines.launch
+
+suspend fun main() = coroutineScope {
+    val client = HttpClient(CIO)
+
+    val regex = """href=\"(.+\.png)\"""".toRegex()
+
+    val initialResponse = client.get("https://sciprog.center")
+    val resources = regex.findAll(initialResponse.bodyAsText()).map { it.groupValues[1] }
+    resources.forEach { resourceName ->
+        launch {
+            println("Resource processing for $resourceName started")
+            val resourceResponse = client.get("https://sciprog.center$resourceName")
+            val bodyBytes: ByteArray = resourceResponse.bodyAsBytes()
+            //do something with the body
+            println("The resource with name $resourceName has ${bodyBytes.size} bytes")
+        }
+    }
+}
\ No newline at end of file