Alpha Flicker [AS]

programming flash
1

I want to create a flicker effect without using a tween on the timeline.

Can it be done with AS? How could I make the below code, instead of fading in, to flicker twice.

function FadeDragger() {

[COLOR=Blue]this[/COLOR].onEnterFrame = function() {
		dragger_session[COLOR=Blue]._alpha [/COLOR] += 5;
		if (dragger_session[COLOR=Blue]._alpha[/COLOR]>=100) {
			delete [COLOR=Blue]this[/COLOR].onEnterFrame;
		}
	};
}

Thanks