Countdown

I want to display a count down from 100 to 1.

I have this script but not able to reverse the countdown i.e., from 100 to 1

if (time3 == 100) {
time3 = 100;
//gotoAndPlay(“end”);
} else {
time3 = Math.floor(getTimer()/1000);
}

[quote=neilmmm;2323682]i would use setInterval

var num:Number = 100;
my_txt.text = num;
var countInt:Number;
function countDown() {
 trace(num);
 if (num>0) {
  num--;
  my_txt.text = num;
 } else {
  clearInterval(countInt);
 }
}
countInt = setInterval(countDown, 1000);

[/quote]

Thanks a lot neilmmm.