Preloader help!

[=RIDDICK=]

What've created, well had help with, is a preloader which loads the bytes.

movieLoaded = this.getBytesLoaded();
movieTotal = this.getBytesTotal();
percentage = Math.floor(movieLoaded/movieTotal*100);
display.text = "LOADED: "+percentage+" %";
if (percentage >= 100) {
gotoAndPlay("content", 1);
}

This works fine, but what I want to do is to have a loading bar along side the existing preloader.

What would I need to add to the existing script to make it work?

Cheers