<?xml version="1.0" encoding="utf-8"?>
<!-- http://blog.flexexamples.com/2007/09/26/positioning-items-in-flex-using-a-constraint-based-layout/ -->
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
        layout="vertical"
        verticalAlign="middle"
        backgroundColor="white" viewSourceURL="srcview/index.html">

    <mx:Style>
        .bugImage {
            bottom: 20;
            right: 20;
        }
    </mx:Style>

    <mx:Canvas id="canvas"
            backgroundColor="black"
            backgroundAlpha="0.4"
            width="100%"
            height="100%">
        <mx:Image source="assets/bug.png"
                styleName="bugImage" />
    </mx:Canvas>

</mx:Application>