void Update()
 {
     if (Time.time - lastTickedOn > .5f)
     {
         lastTickedOn = Time.time;
         bti.ExecuteBehaviourTree();
         if (bti.Completed)
         {
             Debug.Log("BT END");
             UnityEditor.EditorApplication.isPlaying = false;
         }
         //Debug.Log("ticked "+Time.time);
     }
 }