todoat the end of the countdownplay sound file after importing time and subprocessmake variable called timeleft to hold the number of seconds left in the countdown it can start at --or you can change the value here to whatever you needor even have it get set from command line argument in while loopyou display the remaining count vpause for second wand then decrement the timeleft variable before the loop starts over again the loop will keep looping as long as timeleft is greater than after thatthe countdown will be over step play the sound file while there are third-party modules to play sound files of various formatsthe quick and easy way is to just launch whatever application the user already uses to play sound files the operating system will figure out from the wav file extension which application it should launch to play the file this wav file could easily be some other sound file formatsuch as mp or ogg you can use any sound file that is on your computer to play at the end of the countdownor you can download alarm wav from /automatestuff add the following to your code#python countdown py simple countdown script import timesubprocess --snip-at the end of the countdownplay sound file subprocess popen(['start''alarm wav']shell=trueafter the while loop finishesalarm wav (or the sound file you choosewill play to notify the user that the countdown is over on windowsbe sure to include 'startin the list you pass to popen(and pass the keyword argument shell=true on macospass 'openinstead of 'startand remove shell=true instead of playing sound fileyou could save text file somewhere with message like break time is overand use popen(to open it at the end of the countdown this will effectively create pop-up window with message or you could use the webbrowser open(function to open specific website at the end of the countdown unlike some free countdown application you' find onlineyour own countdown program' alarm can be anything you wantkeeping timescheduling tasksand launching programs