auto save

snake.py

@@ -58,8 +58,8 @@ while True:
         num1=random.randint(0,21)
         num2=random.randint(0,15)
         apple_x=30*num1
-
         apple_y=30*num2
+    else:
         position.pop(0)
     # 将背景图画上去
     screen.blit(background, (0, 0))