ActionScript 3.0 :: Get My Timer To Do An Automatic Reset Once Its Down To 0?

I have set up the timer and it counts down correctly.how to get my timer to do an automatic reset once its down to 0.

Quote:
import flash.utils.Timer;
import flash.events.TimerEvent;

/*This creates a new timer object, that fires every 1000 milliseconds (each second), and will fire 10 times after it is started, then stop. Next we will create an event listener that will catch the Timer event, and call a function "changeText".*/

var alienTimer:Timer = new Timer(1000,10)
// declare an integer that starts the timer at 10! this shows the seconds left on the timer
var secondsLeft:int = 10;[code]................