Using AnimateProperty to animate control by property
<?xml version="1.0"?> <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"> <mx:Sequence id="animateScaleXUpDown"> <mx:AnimateProperty property="scaleX" fromValue="1.0" toValue="1.5" /> <mx:AnimateProperty property="scaleX" fromValue="1.5" toValue="1.0" /> </mx:Sequence> <mx:Button label="Scale Button" mouseDownEffect="{animateScaleXUpDown}" /> </mx:Application>