How to make a infinite loop after a certain interval of time?

I had made a music player where I want to make a infinite loop which will play after song will end and the song is a random song(a song played from a selected folder) so I want to make loop on random_music(local variable). I had tried much but I can't make this loop.

Please help me to solve this problem

Here is my code

'''

#code

random_music = ''
mfile=''
def Play(event=None):
    global random_music, mfile
    if (shuffleUnshuffleBtn['text'] == ''): 
        mfile= MUSIC_FILE+'/../'
        print("Shuffle")
        print(mfile)
        songs =os.listdir(mfile)
        noOfSongs=len(songs)
        ListOfSongsInDir = [i for i in range(1, noOfSongs)]
        print(songs)
        print(len(songs))
        print(ListOfSongsInDir)
        random_music = random.choice(songs)
        while (progressbar_music_starttime==progressbar_music_startend):
            print(random.choice(songs))
            #random_music = random.choice(songs)
            # sleep()
        print(random_music)
        c=(os.path.join(mfile, random_music))
            # i+=1
            
        mixer.init()
        # ad=audiotrack.get()
        
        mixer.music.load(c)
        print(c)
        progressbar_Ibl.place()
        mixer.music.play()
        progressbar_music_label.place()
        song=MP3(mfile+random_music)

'''

Here MUSIC_FILE is a song that select by user