gistfile1.as

package{
    import flash.display.Sprite;
    import flash.events.Event;

    public class RotateToMouse extends Sprite {
	private var arrow:Arrow;

	public function RotateToMouse(){
	    init();
	}
	private function init():void{
	    arrow = new Arrow();
	    addChild(arrow);
	    arrow.x = stage.stageWidth / 2;
	    arrow.y = stage.stageHeight / 2;
	    addEventListener(Event.ENTER_FRAME, onEnterFrame);
	}
	public function onEnterFrame(event:Event):void{
	    var dx:Number = mouseX - arrow.x;
	    var dy:Number = mouseY - arrow.y;
	    var radians:Number = Math.atan2(dy,dx);
	    arrow.rotation = radians * 180 / Math.PI;
	}
    }
}