[silin]

а че бы не по-простому

public class MouseHunter extends Sprite
{
	private const a:Number = 0.2;
	public function MouseHunter() 
	{
		graphics.beginFill(0);
		graphics.drawCircle(0, 0, 20);
		addEventListener(Event.ENTER_FRAME, onEnterFrameHandler);
	}
 
	private function onEnterFrameHandler(event:Event):void 
	{
		x += a * mouseX;
		y += a * mouseY;
	}
}