倒计时闹钟

import time,winsound
sfile='tada.wav'
while 1:
    count=0
    a=int(input('time by Min:'))
    b=a*60
    while (count<b):
        ncount=b-count
        print (ncount)
        time.sleep(5)
        count+=5
    print ('done')
    for i in range(3):
        winsound.PlaySound('C:\Windows\Media\\{}'.format(sfile), winsound.SND_FILENAME)