Space age random generated text before revealing real text?

programming flash
1

How is this done?

http://www.rodec.com/site/content/home.asp

See how the text comes in as random generated text before revealing the real text. Its like that matrix or space aged thing happening.

Here are some code that I found, but don’t know how to modify it to do this:

var str:String = " What is the answer";

var sInt = setInterval(writeIt,1);
var count:Number = 0;
var s:Sound = new Sound();
s.attachSound("type");

function writeIt() {
	if(count == 0) {
		s.start(0,1000);
	}
	theText.text = str.substring(0,count);
	count += 5;
	if(count > str.length) {
		clearInterval(sInt);
		s.stop();
	}
}

I don’t mind how this is setup though, it looks pretty straight forward, it just doesn’t do that random generated text to reveal teh real text.