auto save

snake.py

@@ -62,8 +62,8 @@ while True:
     for i in range(len(position)-1):
         screen.blit(body, position[i])
     if dejecta_x==x and dejecta_y==y:
-        dejecta_x=random.randint(0,660)
-        dejecta_y=random.randint(0,660)
+        dejecta_x=random.randint(0,630)
+        dejecta_y=random.randint(0,450)
     # 将果实画上去
     screen.blit(food, (dejecta_x, dejecta_y))
     # 刷新画面