save project

snake.py

@@ -23,7 +23,7 @@ while True:
             exit()
     x+=30
     position.append((x,y))
-    popsition.pop(0)
+    position.pop(0)
     # 将背景图画上去
     screen.blit(background, (0, 0))
     screen.blit(right,position[-1])