package {
    import flash.display.Sprite;

    public class Ball extends Sprite {
        private var radius:Number;
        private var color:uint;

        public function Ball(radius:Number=40, color:uint=0xff0000) {
            this.radius = radius;
            this.color = color;
            init();
        }
        public function init():void {
            graphics.beginFill(color);
            graphics.drawCircle(0, 0, radius);
            graphics.endFill();
        }
    }
}