<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
        layout="vertical"
        verticalAlign="middle"
        backgroundColor="white"
        initialize="init();">
 
    <mx:Script>
        <![CDATA[
            import mx.controls.Alert;
 
            protected var timer3:Timer;
 
            protected function init():void {
                timer3 = new Timer(50 /*delay in ms*/, 150 /*repeatCount*/);
                timer3.addEventListener(TimerEvent.TIMER, timer3_timerHandler);
                timer3.addEventListener(TimerEvent.TIMER_COMPLETE, timer3_timerCompleteHandler);
            }
 
            protected function timer3_timerHandler(evt:TimerEvent):void {
                pBar.setProgress(timer3.currentCount, timer3.repeatCount);
            }
 
            protected function timer3_timerCompleteHandler(evt:TimerEvent):void {
                Alert.show("Timer done");
                timer3.reset();
            }
 
            protected function button1_clickHandler(evt:MouseEvent):void {
                if (timer3.running) {
                    timer3.stop();
                    timer3.reset();
                }
                timer3.start();
            }
        ]]>
    </mx:Script>
 
    <mx:ProgressBar id="pBar" label="%1 of %2 (%3%%)" labelPlacement="center" mode="manual" />
    <mx:Button id="button1" label="start timer" click="button1_clickHandler(event);" />
 
</mx:Application>