diff --git a/src/main/kotlin/org/magicghostvu/actor/Behavior.kt b/src/main/kotlin/org/magicghostvu/actor/Behavior.kt
index 5d83550..aad02bd 100644
--- a/src/main/kotlin/org/magicghostvu/actor/Behavior.kt
+++ b/src/main/kotlin/org/magicghostvu/actor/Behavior.kt
@@ -1,6 +1,5 @@
 package org.magicghostvu.actor
 
-import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.ObsoleteCoroutinesApi
 import kotlinx.coroutines.channels.ActorScope
 import kotlinx.coroutines.channels.SendChannel
diff --git a/src/main/kotlin/org/magicghostvu/actor/Behaviors.kt b/src/main/kotlin/org/magicghostvu/actor/Behaviors.kt
index ccb3b63..0e8db11 100644
--- a/src/main/kotlin/org/magicghostvu/actor/Behaviors.kt
+++ b/src/main/kotlin/org/magicghostvu/actor/Behaviors.kt
@@ -176,8 +176,8 @@ object Behaviors {
         return MActorRef(internalChannel as SendChannel<T>)
     }
 
-
-    fun <T> CoroutineScope.spawnChild(
+    @OptIn(ObsoleteCoroutinesApi::class)
+    fun <T> ActorScope<T>.spawnChild(
         debug: Boolean = false,
         factory: suspend () -> Behavior<T>
     ): MActorRef<T> {
diff --git a/src/main/kotlin/org/magicghostvu/run/RunActor.kt b/src/main/kotlin/org/magicghostvu/run/RunActor.kt
index efb8643..64a2b31 100644
--- a/src/main/kotlin/org/magicghostvu/run/RunActor.kt
+++ b/src/main/kotlin/org/magicghostvu/run/RunActor.kt
@@ -124,8 +124,8 @@ fun main(arr: Array<String>) {
         }
         parent.tell(Msg1())
 
-        /*delay(5000)
-        parent.tell(Msg4())*/
+        delay(5000)
+        parent.tell(Msg4())
 
     }
 }
\ No newline at end of file