//init(); //call this function once, at the very beginning, to initialize everything
//
// function init():void
// {
//     stage.addEventListener(Event.ENTER_FRAME, loop); //every time our game enters a new frame (60 times per second), this event listener will fire and our game will loop
// }
//
// function loop(e:Event):void
// {
//
// }
// var ballSpeedX:int = -3;
// var ballSpeedY:int = -2;
//
// init();
//
// function init():void
// {
//     stage.addEventListener(Event.ENTER_FRAME, loop);
// }
//
// function loop(e:Event):void
// {
//     ball.x += ballSpeedX;
//     ball.y += ballSpeedY;
//
//     //because the ball's position is measured by where its CENTER is...
//     //...we need add or subtract half of its width or height to see if that SIDE is hitting a wall
//
//     //first check the left and right boundaries
//     if(ball.x <= ball.width/2){ //check if the x position of the left side of the ball is less than or equal to the left side of the screen, which would be 0
//         ball.x = ball.width/2; //then set the ball's x position to that point, in case it already moved off the screen
//         ballSpeedX *= -1; //and multiply the ball's x speed by -1, which will make it move right instead of left
//
//     } else if(ball.x >= stage.stageWidth-ball.width/2){ //check to see the right side of the ball is touching the right boundary, which would be 550
//         ball.x = stage.stageWidth-ball.width/2; //reposition it, just in case
//         ballSpeedX *= -1; //multiply the x speed by -1 (now moving left, not right)
//    \
//     }
//
//     //now we do the same with the top and bottom of the screen
//     if(ball.y <= ball.height/2){ //if the y position of the top of the ball is less than or equal to the top of the screen
//         ball.y = ball.height/2; //like we did before, set it to that y position...
//         ballSpeedY *= -1; //...and reverse its y speed so that it is now going down instead of up
//
//     } else if(ball.y >= stage.stageHeight-ball.height/2){ //if the bottom of the ball is lower than the bottom of the screen
//         ball.y = stage.stageHeight-ball.height/2; //reposition it
//         ballSpeedY *= -1; //and reverse its y speed so that it is moving up now
//
//     }
// }

var ballSpeedX:int = -3;

 var ballSpeedY:int = -2;



 init();



 function init():void

 {

     stage.addEventListener(Event.ENTER_FRAME, loop);

 }



 function loop(e:Event):void

 {

     ball.x += ballSpeedX;

     ball.y += ballSpeedY;



     //because the ball's position is measured by where its CENTER is...

     //...we need add or subtract half of its width or height to see if that SIDE is hitting a wall



     //first check the left and right boundaries

     if(ball.x <= ball.width/2){ //check if the x position of the left side of the ball is less than or equal to the left side of the screen, which would be 0

         ball.x = ball.width/2; //then set the ball's x position to that point, in case it already moved off the screen

         ballSpeedX *= -1; //and multiply the ball's x speed by -1, which will make it move right instead of left



     } else if(ball.x >= stage.stageWidth-ball.width/2){ //check to see the right side of the ball is touching the right boundary, which would be 550

         ball.x = stage.stageWidth-ball.width/2; //reposition it, just in case

         ballSpeedX *= -1; //multiply the x speed by -1 (now moving left, not right)



     }



     //now we do the same with the top and bottom of the screen

     if(ball.y <= ball.height/2){ //if the y position of the top of the ball is less than or equal to the top of the screen

         ball.y = ball.height/2; //like we did before, set it to that y position...

        ballSpeedY *= -1; //...and reverse its y speed so that it is now going down instead of up



     } else if(ball.y >= stage.stageHeight-ball.height/2){ //if the bottom of the ball is lower than the bottom of the screen

         ball.y = stage.stageHeight-ball.height/2; //reposition it

         ballSpeedY *= -1; //and reverse its y speed so that it is moving up now



     }

 }