void OnTriggerEnter(Collider other)
    {
        if (other.gameObject.tag == "sentinel")
        {

            objectMovement = Sentinel.gameObject.GetComponent<SentinelMovement>();

        }
    }
 void OnTriggerExit(Collider other)
 {
     if (other.gameObject == Sentinel)
     {
         objectMovement = null;
     }
     if (other.gameObject.name == "pacman" && objectMovement != null)
     {
         objectMovement.Invoke ("ResumeStatus", 0);
     }
 }