save project

my_music.py

@@ -55,7 +55,14 @@ 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.locals(music_list[num])    
+                        pygame.mixer.music.play()
+                        click = 0
+                        play_button = stop_img
     if pygame.mixer.music.get_busy() == False:
         num +=1
         if num>len(music_list)-1: