[lexa2000lexa]

вот так можно

var num = 10;
onEnterFrame = function(){
	if(num<100){
		num++;
		trace(mc)
		var mc:MovieClip = this.createEmptyMovieClip("mc",1)
		mc.lineStyle(3, 0xff0000, 100);
		mc.moveTo(num, 100);
		mc.lineTo(100, 100);
	}
	else{
		delete onEnterFrame;
		}
}