gistfile1.as

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

    public class Wave1 extends Sprite{
	private var ball:Ball;
	private var angle:Number = 0;
	private var centerY:Number = 200;
	private var range:Number = 50;
	private var xspeed:Number = 1;
	private var yspeed:Number = .05;

	public function Wave1(){
	    init();
	}
	private function init():void{
	    ball = new Ball();
	    addChild(ball);
	    ball.x = 0;
	    addEventListener(Event.ENTER_FRAME, onEnterFrame);
	}
	public function onEnterFrame(event:Event):void{
	    ball.x += xspeed;
	    ball.y = centerY + Math.sin(angle) * range;
	    angle += yspeed;
	}
    }
}