auto save

my_game.py

@@ -64,6 +64,11 @@ while True:
         if index >= 5:
             index = 0
     # 将背景图画上去
+    screen.blit(background,(0,0))
+    road_x -= 8
+    screen.blit(road_x,500)
+
+    screen
     shan_x -=2
     if shan_x <-1000:
         shan_x=0