var fl_SecondsToCountDown:Number = 3;

var fl_CountDownTimerInstance:Timer = new Timer(1000, fl_SecondsToCountDown);
fl_CountDownTimerInstance.addEventListener(TimerEvent.TIMER, fl_CountDownTimerHandler);
fl_CountDownTimerInstance.start();

function fl_CountDownTimerHandler(event:TimerEvent):void
{
	fl_SecondsToCountDown--;
	if (fl_SecondsToCountDown == 0)
	{
		nextFrame();
	}
}