#! /usr/bin/env python

import pygame.mixer, pygame.time

pygame.mixer.init(22050)

def play(file):
	sound=pygame.mixer.Sound(file)
	channel=sound.play()
	while channel.get_busy():
		pygame.time.wait(10)

liste=['ph1.wav','ph2.wav','ph3.wav','ph4.wav']

import random
random.shuffle(liste)

while (liste != []):
	stimulus = liste[0]
	liste = liste[1:]
	play(stimulus)