Game Technique Help

programming flash
1

hi
im creating a brick builder game

ive got the paddle and ball moving now i just want the ball to bounce off the paddle hit the brick and then the brick disappears, i am using document classes, im just stuck on this bit, any help would be appreciated, please need your help lol

package {
    import flash.display.*;
    import flash.events.*;
    import flash.text.*;
    import flash.ui.Mouse;
    public class Breakout extends Sprite {
        var ball_mc:Ball;
        var xVel:int=10;
        var yVel:int=10;

        var paddle_mc:Paddle;

        function Breakout() {
            ball_mc=new Ball();
            ball_mc.x=100;
            ball_mc.y=100;
            this.addChild(ball_mc);

            paddle_mc=new Paddle();
            paddle_mc.x=250;
            paddle_mc.y=380;//this positions the paddle on the screen, currently at the bottom of the screen//
            this.addChild(paddle_mc);
            paddle_mc.init();
            start_btn.addEventListener(MouseEvent.CLICK,startGame);
            this.addEventListener(Event.ENTER_FRAME, updateGame);
        }
        function startGame(evt:MouseEvent) {
            this.addEventListener(Event.ENTER_FRAME,moveBall);
            start_btn.visible=false;
        }
        private function updateGame(e:Event) {
            paddle_mc.moveIt();
        }
        function moveBall(e:Event) {
            ball_mc.y=ball_mc.y-yVel;
            ball_mc.x=ball_mc.x-xVel;
            if (ball_mc.x>this.stage.stageWidth || ball_mc.x<0) {
                xVel=xVel*-1;
            }
            if (ball_mc.y>this.stage.stageHeight || ball_mc.y<0) {
                yVel=yVel*-1;
            }
        }
        //Hitting the paddle
        if (Ball.hitTestObject(Paddle)) {
            calcBallAngle();
        }
    }
}

package {
    import flash.display.MovieClip;
    import flash.events.*;
    import flash.events.KeyboardEvent;

    public class Paddle extends MovieClip {
        var left:Boolean;                    
        var right:Boolean;                    

        function Paddle() {
            this.stop();
        }
        function init() {
            this.stage.addEventListener(KeyboardEvent.KEY_DOWN,keyDownHandler);    
            this.stage.addEventListener(KeyboardEvent.KEY_UP,keyUpHandler);        
        }

        private function keyDownHandler(e:KeyboardEvent):void {
            if (e.keyCode==37) {            
                left=true;
            }
            if (e.keyCode==39) {            
                right=true;
            }
        }
        private function keyUpHandler(e:KeyboardEvent):void {
            if (e.keyCode==37) {            
                left=false;
            }
            if (e.keyCode==39) {            
                right=false;
            }
        }

        function moveIt() {
            if (left==true) {                
                this.x-=10;
            }
            if (right==true) {                
                this.x+=10;
            }
            if (this.x <= 48) {                
                this.x+=10;
            }
            if (this.x >= 500) {            
                this.x-=10;
            }
        }
    }
}

my two class files, your help would be much appreciated thank you