save project

my_music.py

@@ -66,7 +66,7 @@ while True:
                     play_button = play_img
                 if x>420 and x<520 and y>350 and y<400:
                     num += 1
-                    if num > 3 :
+                    if num > len(music_list) - 1 :
                         num = 0
                     pygame.mixer.music.load(path+'\\'+music_list[num])
                     pygame.mixer.music.play()