ActionScript 3.0 :: HitTestObject : Make A Box That Will Bounce Slowly Between 2 And Repeat?

im trying to make a box that will bounce slowly between 2 and repeat ( i hope that makes sense 0_o) so far the code i have is

import flash.events.Event;
var speed:int = 3;
var hit:Boolean = false;

[code]....

but one it hits wall 1 it moves 3 pixels to the right and stops =/ i tried changing the if(hit == true) to

if(ball.hitTestObject(wall1)){
ball.x += speed;
}

but it does the same thing.