protected void RemoveFront()
 {
     _FrontCentipede = null;
 }
 protected void RemoveTail()
 {
     _TailCentipede = null;
 }
 public void SetNeighbor(Centipede _front, Centipede _tail)
 {
     _FrontCentipede = _front;
     _TailCentipede  = _tail;
 }