Click a button a certain amount of times within a certain amount of time?

This is what I was thinking but I know there's probably a lot wrong with it!

var numClicks = 0; //number of times you click on button

theButton.addEventListener(MouseEvent.MOUSE_DOWN, buttonClicks);function buttonClicks(event:MouseEvent):void {

numClicks++

}

var nCount:Number = 10;

var myTimer:Timer = new Timer(1000, nCount);

timer_txt.text = nCount.toString();                                                                             //making the timer

myTimer.start();

myTimer.addEventListener(TimerEvent.TIMER, countdown);

function countdown(e:TimerEvent):void

{

          nCount--;

          timer_txt.text = nCount.toString();

}

if(timer_txt.text == 0 && numClicks==20) {

gotoAndPlay(1, "scene 2");

}                   

else

{ gotoAndPlay(1, "scene1");}                           //an if statement to see if the timer is at zero and you've got enough clicks, otherwise restart