auto save

snake.py

@@ -26,7 +26,9 @@ while True:
     # 将贪吃蛇画上去
     screen.blit(right, (x, y))
     # 将贪吃蛇的身体画上去
-    
+    screen.blit(body, (210, 120))
+    screen.blit(body, (180, 120))
+    screen.blit(body, (180, 90))
     
     screen.blit(food, (360, 300))
     # 刷新画面