save project

my_music.py

@@ -49,6 +49,14 @@ while True:
                 else:
                     play_button = play_img
                     pygame.mixer.music.pause()
+            if x>120 and x<220 and y>350 and Y<400:
+                num-=1
+                if num<0
+                    num=len(music_list)-1
+                pygame.mixer.music.load(path+"\\"+music_list[num])
+                pygame.mixer.music.play()
+                click=0
+                play_img=stop_img
 
     if pygame.mixer.music.get_busy() == False:
         num+=1