save project

my_game.py

@@ -67,6 +67,7 @@ while True:
     stone_x-=20
     if stone_x < 0-new_stone.get_rect()[2]:     
         new_stone=random.choice([stone,cacti,apple])
+        yy=500-new_stone.get_rect()[3]
         stone_x=1000
     screen.blit(new_stone,(stone_x,yy))
     # 刷新画面