Adding a Sprite to the display list in Flex 4

<?xml version="1.0" encoding="utf-8"?>
<!-- http://blog.flexexamples.com/2009/11/20/adding-a-sprite-to-the-display-list-in-flex-4/ -->
<s:Application name="Spark_SpriteVisualElement_addChild_test"
        xmlns:fx="http://ns.adobe.com/mxml/2009"
        xmlns:s="library://ns.adobe.com/flex/spark"
        xmlns:mx="library://ns.adobe.com/flex/halo"
        initialize="init();">
 
    <fx:Script>
        <![CDATA[
            private const spr1:Sprite = new Sprite();
            private const spr2:Sprite = new Sprite();
 
            private function init():void {
                spr1.graphics.beginFill(0xFF0000, 0.5);
                spr1.graphics.drawRect(10, 10, 100, 80);
                spr1.graphics.endFill();
                con.addChild(spr1);
 
                spr2.graphics.beginFill(0x0000FF, 0.3);
                spr2.graphics.drawRect(20, 20, 80, 100);
                spr2.graphics.endFill();
                con.addChild(spr2);
            }
        ]]>
    </fx:Script>
 
    <s:SpriteVisualElement id="con" />
 
</s:Application>