Как сделать так, чтобы музыка проигрывалась последовательно?

Как сделать так, чтобы музыка проигрывалась последовательно?

from tkinter import filedialog
from tkinter import *
import pygame
import os

root = Tk()
root.title('MP-3 Pleer')
root.geometry("500x300")


pygame.mixer.init()
menubar = Menu(root)
root.config(menu=menubar)


songs = []
current_song = ""
pause = False

def load_music():
    global current_song #
    root.directory = filedialog.askdirectory()

    for song in os.listdir(root.directory):
        name, ext = os.path.splitext(song)в
        if ext == '.mp3':
            songs.append(song)



    for song in songs:
        songlist.insert("end",song)

    songlist.select_set(0)
    current_song = songs[songlist.curselection()[0]]


def play_music():
    global current_song, paused

    if not pause:
        pygame.mixer.music.load(os.path.join(root.directory, current_song))
        pygame.mixer.music.play()
    else:
        pygame.mixer.music.unpause()
        paused=False

def pause_music():
    global pause
    pygame.mixer.music.pause()
    pause = True

def next_music():
    global current_song, paused

    try:
        songlist.select_clear(0, END)
        songlist.select_set(songs.index(current_song) + 1)
        current_song = songs[songlist.curselection()[0]]
        play_music()
    except:
        pass


def prev_music():
    global current_song, paused

    try:
        songlist.select_clear(0, END)
        songlist.select_set(songs.index(current_song) - 1)
        current_song = songs[songlist.curselection()[0]]
        play_music()
    except:
        pass


organise_menu = Menu(menubar, tearoff=False)
organise_menu.add_command(label='Add music', command=load_music)
menubar.add_cascade(label='Menu', menu=organise_menu)





songlist = Listbox(root, bg="black", fg="white", width=100, height=15)
songlist.pack()



play_btn_image = PhotoImage(file='play.png')
pause_btn_image = PhotoImage(file='pause.png')
next_btn_image = PhotoImage(file='next.png')
prev_btn_image = PhotoImage(file='previous.png')
#add_btn_image = PhotoImage(file='pngwing.com (2).png')



control_frame = Frame(root)
control_frame.pack()


play_btn = Button(control_frame, image=play_btn_image, borderwidth=0, command=play_music)
pause_btn = Button(control_frame, image=pause_btn_image, borderwidth=0, command=pause_music)
next_btn = Button(control_frame, image=next_btn_image, borderwidth=0, command=next_music)
prev_btn = Button(control_frame, image=prev_btn_image, borderwidth=0,command=prev_music)
#add_btn = Button(control_frame, image=add_btn_image, borderwidth=0)


play_btn.grid(row=0, column=1, padx=7, pady=10)
pause_btn.grid(row=0, column=2, padx=7, pady=10)
next_btn.grid(row=0, column=3, padx=7, pady=10)
prev_btn.grid(row=0, column=0, padx=7, pady=10)
#add_btn.grid(row=0, column=4, padx=7, pady=10)

root.mainloop()