save project

my_music.py

@@ -47,11 +47,19 @@ while True:
             else:
                 pygame.mixer.music.unpause()    
                 play_button=stop_img 
+            if x>120 and y>350 and x<220 and y<400:
+                num=num-1
+                if num<0:
+                    num=len(path+"\\"+music_list[num])-1
+                pygame.mixer.music.load(path+"\\"+music_list[num])
+                pygame.mixer.music.play()
+                chick=0
+                play_button=stop_img
     if pygame.mixer.music.get_busy()==False:
         num=num+1
         if num>len(music_list)-1:
             num=0
-        pygame.mixer.music.load(music_list[num])
+        pygame.mixer.music.load(path+"\\"+music_list[num])
         pygame.mixer.music.play()
     # 绘制画面
     screen.blit(bg_img, (0, 0))      # 填充背景