auto save

my_game.py

@@ -61,7 +61,7 @@ while True:
             index = 0
     # 将背景图画上去
     bg_x-=1
-    if bg_x<=-1000
+    if bg_x<=-1000:
        bg_x=0
     screen.blit(background, (bg_x, 0))    # 远处背景
     road_x-=8
@@ -81,4 +81,4 @@ while True:
     screen.blit(obstacle, (rect.x, rect.y)) 
     # 刷新画面
     pygame.display.update()
-    FPS.tick(60)
\ No newline at end of file
+    FPS.tick(55)
\ No newline at end of file