var letters:Array = [ 'A', 'B', 'C', 'D', 'E',
					  'F', 'G', 'H', 'I', 'J',
					  'K', 'L', 'M', 'N', 'O',
					  'P', 'Q', 'R', 'S', 'T', 
					  'U', 'V', 'W', 'X', 'Y',
					  'Z' ]
 
function getRandomLetter():String {
	var randomIndex:uint = Math.floor(Math.random() * letters.length);
	return letters[randomIndex];
}
 
import fl.controls.Button;
 
var i:uint = 0;
var j:uint = 0;
var posX:uint = 0;
var posY:uint = 0;
var buttonSize:uint = 50;
 
while(posY < stage.stageHeight) {
	posX = 0;
	j = 0;
	posY = i * buttonSize;
 
	while(posX < stage.stageWidth) {
		posX = j * buttonSize;
 
		var b:Button = new Button();
		b.setSize(buttonSize, buttonSize);
		b.move(posX, posY);
		b.label = getRandomLetter();
		addChild(b);
 
		j++;
	}
	i++;
}