src/main/scala/lecture6/02-ExecutionContextCreate.scala

+package lecture6
+
+import scala.concurrent.ExecutionContext
+@main def ExecutionContextCreate =
+  val ectx = ExecutionContext.global
+  ectx.execute(new Runnable:
+    override def run() = log("This task is run asynchronously.")
+  )
+  Thread.sleep(500)

src/main/scala/lecture6/common.scala

+package lecture6
+
+val log = println(_)