auto save

snake.py

@@ -68,8 +68,10 @@ while True:
     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])
+        
 
     # 将果实画上去
     screen.blit(food, (apple_x, apple_y))