Updating MovieClips position with an array

programming flash
1

I did this to dynamcy create a instance of a MovieClip whenever my downKey boolean variable was true

 var Lasers:Array = [];

if (downKey == true) {
		var Laser:MovieClip = new laser();
		Laser.name = "Laser" + 1;
		addChild(Laser);
		Laser.x = 200;
		Laser.y = 200;
		Lasers[1] = Laser;

}

works fine, but now I would like to update the position of the MovieClips every frame, I understand that it should be in my enter frame function but I dont understand how to access the MovieClips. Thanks in Advance.