def erase(self):
     Sprite.__del__(self)
 def erase (self):
     Sprite.__del__(self)
 def change(self):
     self.image.fill(color=BG_COLOR)
     self.layer = 0
     Sprite.__del__(self)
 def change (self):
     self.image.fill(color=BG_COLOR)
     self.layer=0
     Sprite.__del__(self)