auto save

my_game.py

@@ -64,6 +64,15 @@ while True:
         if index >= 5:
             index = 0
     # 将背景图画上去
+    
+    bg_x-=1
+    if bg_x<=-1000:
+        bg_x=0
+    screen.blit(background,(bg_x,0))
+    road_x-=8
+    if road_x<=-100:
+        road_x=0
+        
     shan_x -=2
     if shan_x <-1000:
         shan_x=0