<mx:Application
    xmlns:mx="http://www.adobe.com/2006/mxml"
    xmlns:spark="com.scottlogic.sparkline.*"
    creationComplete="initialise()"
>
    <mx:Script>
        <![CDATA[
            import mx.collections.ArrayCollection;
 
            [Bindable]
            private var dp:ArrayCollection = new ArrayCollection();
 
            private var timer:Timer;
 
            private function initialise():void
            {
                timer = new Timer(1000);
                timer.addEventListener(TimerEvent.TIMER, onTimerTick)
                timer.start();
            }
 
            private function onTimerTick(event:TimerEvent):void
            {
                dp.addItem(Math.random());
            }
        ]]>
    </mx:Script>
    <spark:Sparkline dataProvider="{dp}" />
</mx:Application>