var intervalId:Number;

var count:Number = 0;

var maxCount:Number = 14;

var duration:Number = 500;

 

intervalId = setInterval(this, "executeCallback", duration);

 

function executeCallback():Void {

        addNewLetter();

 

        if(count >= maxCount) {

                clearInterval(intervalId);

        } 

        count++;

}

function addNewLetter():Void{

        htmlField.htmlText += '<p><font color="#'+Math.random()*999999+'">W</font></p>';

}