mustella/tests/DownloadProgressBar/SWFs/assets/SparkPreloaderRSLMain.mxml

<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009" xmlns:s="library://ns.adobe.com/flex/spark"
    	width="300" height="250" preloader="SparkDelayedProgressBar">
    <s:layout>
        <s:VerticalLayout />
    </s:layout>

    <s:Button label="Test"/>
    <s:Button label="Test"/>
    <s:Button label="Test"/>
    <s:Button label="Test"/>
    <s:Button label="Test"/>
    <s:Button label="Test"/>
    <s:Button label="Test"/>
    <s:Button label="Test"/>
    <s:Button label="Test"/>
    <s:Button label="Test"/>

</s:Application>