Tutorial: Countdown Timer?

Good Day!

Do you guys know any tutorial on how to display this in Flash it is a Countdown Timer code:

       In case any newbie programmers are scratching their heads: 

// begin sample

timerCount = 135;

countDown = function() {
timerCount = timerCount - 1;
hours = int(timerCount / 3600);
minutes = int((timerCount / 60) - (hours * 60));
seconds = int((timerCount % 60));
}

timer = setInterval(countDown, 1000);

//end sample

from: http://www.dreamincode.net/code/snippet122.htm

sorry I’m just new to Flash and Actionscript.:kir: