auto save

snake.py

@@ -56,14 +56,17 @@ while True:
     if x == apple_x and y == apple_y:
         apple_x=random.randint(1,22)*30-30
         apple_y=random.randint(1,16)*30-30
-        
+        position.insert(0,(position[0]))
+
     # 将背景图画上去
     screen.blit(background, (0, 0))
     # 将贪吃蛇的头画上去
     screen.blit(snake_head, position[-1])
     # 将贪吃蛇的身体画上去
     for i in range(len(position)-1):
-        screen.blit(body, position[i])
+        screen.bl
+        
+
 
     # 将果实画上去
     screen.blit(food, (360, 300))