Start counting down!

[vvvverT]

How can I start a countdown from a single button? I am trying to do, however, without success.

I would like the time to run alone after pressing a particular button and pause when it reaches zero. I did only the part of the dynamic text and the discount of numbers, however, everything manual.

can anybody help me?

//var
var score:uint
score = 7;
counting.text = "" + score.toString();
// EventList
up.addEventListener(MouseEvent.CLICK, up1);
// Actions
function up1(Event:MouseEvent): void {
       score -= 1;
       counting.text = "" + score.toString(); 
       if (score <= 0) {
       score = 0;
  }
  move.gotoAndStop(2);
}

The stopwatch starts in seven seconds, I would like after pressing the "up" button to start counting down to zero and then pause the time.

can anybody help me? Please?

[kglad · Accepted solution]

//var
var t:Timer=new Timer(1000,0);
t.addEventListener(TimerEvent.TIMER,timerF); 
var score:uint score = 7; 
counting.text = "" + score.toString();  
// EventList 
up.addEventListener(MouseEvent.CLICK, up1);  
// Actions 
function up1(Event:MouseEvent): void {
t.start();
}

function timerF(e:TimerEvent):void{  
score -= 1;  
counting.text = "" + score.toString();   
if (score <= 0) {  
score = 0;
t.stop();  
}  else {
move.gotoAndStop(2);
 }
}