auto save

snake.py

 import pygame
-import random
+import rando
 from pygame import locals
 
 # 初始化pygame，为使用硬件做准备
@@ -54,10 +54,11 @@ while True:
     else:
         y += 30
     position.append((x, y))
-    if(apple_x==x and apple_y==y):
-        apple_x=random.randint(0,660)
-        apple_y=random.randint(0,480)
-    position.pop(0)
+        y-=30
+    else:
+        y+=30
+        
+
     # 将背景图画上去
     screen.blit(background, (0, 0))
     # 将贪吃蛇的头画上去