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Dynamic chart with Timer

<?xml version="1.0"?> <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"   initialize="initTimer()">   <mx:Script>     import mx.collections.ArrayCollection;     import flash.utils.Timer;     import flash.events.TimerEvent;     [Bindable]     public var memoryRecording:ArrayCollection = new ArrayCollection();     public function initTimer():void {         var myTimer:Timer = new Timer(1000, 0);         myTimer.addEventListener("timer", timerHandler);         myTimer.start();    }    public function timerHandler(event:TimerEvent):void {        memoryRecording.addItem({totalMemory:flash.system.System.totalMemory,timePoint:getTimer()});    }   </mx:Script>   <mx:Panel title="Line Chart">     <mx:LineChart dataProvider="{memoryRecording}" showDataTips="true">       <mx:series>         <mx:LineSeries yField="totalMemory" xField="timePoint"           displayName="Memory Usage" />       </mx:series>     </mx:LineChart>   </mx:Panel> </mx:Application>