updated l4 boss area, timeout on level end

Levels/Level 4.gd

@@ -26,5 +26,9 @@ func _on_NextArea_area_entered(area: Area2D) -> void:
 
 
 func _on_Demon_Boss_demon_boss_death() -> void:
+    $Timer.start()
+
+
+func _on_Timer_timeout() -> void:
     get_tree().change_scene('res://GUI/Level Complete.tscn')
     queue_free()