ActionScript 3.0 :: Reducing TimeBar According To Time

I'm trying to scale my timebar according to the time. So the longer the time passed the timebar will reduce. It's kind of opposite from the preloader bar. But when I tried my loading bar is increasing towards the left. Is there a way I can make it look like the bar is reducing?

function countTime():void{
var startTime:int = getTimer();
// this is for the seconds
var seconds:int = Math.floor(startTime/1000);
// this is for the minutes ...
var minutes:int = Math.floor(seconds/60);
seconds -= minutes*60;
time_mc.scaleX= -second
trace(minutes +":"+seconds);
}