auto save

my_game.py

@@ -61,8 +61,8 @@ while True:
         if index >= 5:
             index = 0
     # 将背景图画上去
-    bg_x-=1
-    if bg_x<=1000
+    bg_x -= 1
+    if bg_x<=1000:
         bg_x=0
     screen.blit(background, (bg_x, 0)) 
     road_x-=8