save project

my_game.py

@@ -21,9 +21,11 @@ while True:
             exit()
 
     # 将背景图画上去
-    screen.blit(background, (0, 0))
+    screen.blit(background, (0, 0))#渲染
     screen.blit(road, (0, 500))
     screen.blit(hero, (150, 400))
+while True:
+    
     # 刷新画面
     pygame.display.update()
     FPS.tick(60)
\ No newline at end of file