save project

snake.py

@@ -58,7 +58,7 @@ while True:
          apple_x = num1* 30-30
          apple_y = num2* 30-30
     else:
-        position.pop(0)
+         position.pop(0)
     # 将背景图画上去
     screen.blit(background, (0, 0))
     # 将贪吃蛇的头画上去