diff --git a/scada_system/controls/device.py b/scada_system/controls/device.py
index 312c8ec..fc645ef 100644
--- a/scada_system/controls/device.py
+++ b/scada_system/controls/device.py
@@ -1,6 +1,6 @@
 from dataclasses import dataclass
 from typing import Optional, Collection, Any
-from abc import ABCMeta, abstractmethod
+from abc import ABC, abstractmethod
 from enum import Enum
 
 class DeviceLifecycleState(Enum):
@@ -36,7 +36,7 @@ class ActionDescriptor:
     info: Optional[str] = None
 
 
-class Device(metaclass=ABCMeta):
+class Device(ABC):
     _state = DeviceLifecycleState.INIT
 
     @property
diff --git a/scada_system/equipment/turtle_device.py b/scada_system/equipment/turtle_device.py
index fc960d0..2758484 100644
--- a/scada_system/equipment/turtle_device.py
+++ b/scada_system/equipment/turtle_device.py
@@ -1,38 +1,52 @@
-import turtle
+from turtle import Turtle
 from typing import Optional, Collection, Any
 from controls.device import SynchronyDevice
-import time
+from controls.device import TraitDescriptor
+from controls.device import ActionDescriptor
 import inspect
 
 class TurtleDevice(SynchronyDevice): 
     def open(self):
+        self.turtle = Turtle()
         super().open()
-        turtle.Turtle()
     
     def close(self):
+        self.turtle.clear()
         super().close()
-        turtle.bye()  
         
     def execute(self, action_name: str, *args, **kwargs):
-        getattr(turtle, action_name)(args[0], *kwargs)
+        getattr(self.turtle, action_name)(*args, **kwargs)
         
     def read(self, trait_name: str):
-        pass
+        """Read physical state of trait `trait_name` from device."""
+        trait = self.trait_descriptors()[trait_name]
+        if not trait.readable : super().read(trait_name)
+        return trait.info
 
     def write(self, trait_name: str, value: Any) -> bool:
-        pass
+        """Pass `value` to trait `trait_name` of device."""
+        if not self.trait_descriptors()[trait_name] : super().write(trait_name, value)
+        setattr(self.turtle, trait_name, value)
 
     def invalidate(self, trait_name: str):
+        """Invalidate logical state of trait `trait_name`"""
         pass
 
     def trait_descriptors(self):
-        traits = [attr for attr in turtle.Turtle.__dict__
-                      if attr.startswith('__') and not attr.startswith('_')]
+        traits = dict()
+        for name, value in inspect.getmembers(self.turtle):
+            if not callable(value) and not name.startswith('_'):
+                info = f"{value}"
+                traits[name] = TraitDescriptor(name, info)
         return traits
     
     def action_descriptors(self):
-        actions = [(name, func.__doc__) for name, func in inspect.getmembers(turtle.Turtle)
-                   if callable(func) and not name.startswith('__') and not name.startswith('_')]
+        actions = dict()
+        for name, func in inspect.getmembers(self.turtle):
+            if callable(func) and not name.startswith('_'):
+                args = dict(inspect.signature(func).parameters)
+                info = inspect.getdoc(func)
+                actions[name] = ActionDescriptor(name, args, info)
         return actions
 
     def __getitem__(self, trait_name: str):