diff --git a/cern-root-loader/src/commonMain/kotlin/ru/mipt/npm/root/BMN.kt b/cern-root-loader/src/commonMain/kotlin/ru/mipt/npm/root/BMN.kt
index 78053d1d..5ae1671c 100644
--- a/cern-root-loader/src/commonMain/kotlin/ru/mipt/npm/root/BMN.kt
+++ b/cern-root-loader/src/commonMain/kotlin/ru/mipt/npm/root/BMN.kt
@@ -4,6 +4,7 @@ import kotlinx.serialization.Serializable
 import kotlinx.serialization.builtins.ListSerializer
 import kotlinx.serialization.json.Json
 import kotlinx.serialization.json.JsonArray
+import space.kscience.visionforge.solid.Float32Vector3D
 
 
 @Serializable
@@ -16,6 +17,8 @@ public data class FairTrackParam(
     val fQp: Double,
 )
 
+public fun FairTrackParam.toVector(): Float32Vector3D = Float32Vector3D(fX,fY,fZ)
+
 @Serializable
 public data class CbmStsTrack(
     val fParamFirst: FairTrackParam,
diff --git a/demo/playground/src/jvmMain/kotlin/rootParser.kt b/demo/playground/src/jvmMain/kotlin/BmnDemo.kt
similarity index 64%
rename from demo/playground/src/jvmMain/kotlin/rootParser.kt
rename to demo/playground/src/jvmMain/kotlin/BmnDemo.kt
index 04aa71f7..8f38af59 100644
--- a/demo/playground/src/jvmMain/kotlin/rootParser.kt
+++ b/demo/playground/src/jvmMain/kotlin/BmnDemo.kt
@@ -4,16 +4,14 @@ import ru.mipt.npm.root.BMN
 import ru.mipt.npm.root.DGeoManager
 import ru.mipt.npm.root.rootGeo
 import ru.mipt.npm.root.serialization.TGeoManager
+import ru.mipt.npm.root.toVector
 import space.kscience.dataforge.meta.Meta
 import space.kscience.dataforge.meta.get
 import space.kscience.dataforge.meta.isLeaf
 import space.kscience.dataforge.meta.string
 import space.kscience.visionforge.Colors
 import space.kscience.visionforge.html.ResourceLocation
-import space.kscience.visionforge.solid.Solids
-import space.kscience.visionforge.solid.ambientLight
-import space.kscience.visionforge.solid.invoke
-import space.kscience.visionforge.solid.solid
+import space.kscience.visionforge.solid.*
 import java.util.zip.ZipInputStream
 import kotlin.io.path.Path
 import kotlin.io.path.writeText
@@ -52,6 +50,30 @@ fun main() {
                 rootGeo(geo,"BM@N", ignoreRootColors = true).also {
                     Path("data/BM@N.vf.json").writeText(Solids.encodeToString(it))
                 }
+
+                solidGroup("cbmStsTracks") {
+                    events.cbmTracks.forEach { track ->
+                        polyline(
+                            track.fParamFirst.toVector(),
+                            track.fParamLast.toVector()
+                        ) {
+                            thickness = 2.0
+                            color(Colors.blue)
+                        }
+                    }
+                }
+
+                solidGroup("bmnGlobalTracks") {
+                    events.bmnGlobalTracks.forEach { track ->
+                        polyline(
+                            track.fParamFirst.toVector(),
+                            track.fParamLast.toVector()
+                        ) {
+                            thickness = 2.0
+                            color(Colors.red)
+                        }
+                    }
+                }
             }
         }
     }