void invertGoUp(ThiefCar target)
 {
     if (target.getGoUp())
     {
         target.setGoUp(false);
         rotateInverse(target.gameObject.transform.GetChild(0).gameObject, 180);
     }
     else
     {
         target.setGoUp(true);
         rotateInverse(target.gameObject.transform.GetChild(0).gameObject, 0);
     }
     target.setVertical(true);
 }
 void Start()
 {
     thief  = player.GetComponent <ThiefCar>();
     police = enemy.GetComponent <ThiefCar>();
 }