<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="vertical" xmlns:sample="sample.*" viewSourceURL="srcview/index.html">
    <mx:Script>
        <![CDATA[
            import sample.Song;
            import sample.Playlist;
            
            [Bindable]
            private var playlist:Playlist = new Playlist();
            
            private function addSong():void
            {
                playlist.addSong( new Song( "Sweet Tune", 200 ) );
            }
            
        ]]>
    </mx:Script>
    <mx:Button label="Add Song" click="addSong()" />
    <mx:Label id="lbl" text="{playlist.totalTime}" />
</mx:Application>