Snake Game

Traceback (most recent call last):
  File "C:/Users/hicham/Desktop/Python Games/Snake in Python.py", line 93, in <module>
    wn.update()
  File "C:\Python34\lib\turtle.py", line 1304, in update
    t._drawturtle()
  File "C:\Python34\lib\turtle.py", line 3011, in _drawturtle
    width=w, top=True)
  File "C:\Python34\lib\turtle.py", line 514, in _drawpoly
    self.cv.coords(polyitem, *cl)
  File "<string>", line 1, in coords
  File "C:\Python34\lib\tkinter\__init__.py", line 2307, in coords
    self.tk.call((self._w, 'coords') + args))]
_tkinter.TclError: invalid command name ".39595344"