save project

my_music.py

 import pygame
-from pygame
+from pygame import locals
+import os
 pygame.init()
+screen = pygame.display.set_mode((640,480))
 bg_img = pygame.image.load('background.png')  # 背景图
 play_img = pygame.image.load('play.png')  # 播放按钮
 stop_img = pygame.image.load('stop.png')  # 暂停按钮
@@ -51,7 +53,7 @@ while True:
                         play_button = play_img
                         pygame.mixer.music.pause()
 
-                if x>120 and x<220 and y>350 and y<400:
+                if x>120 and x<220 and y>350 and y<450:
                     num-=1
                     if num<0:
                         num = len(music_list)-1