W3C Talk - slide "Animation Example"

<smil xmlns="http://www.w3.org/2000/SMIL20/CR/Language">
    <head>
        <layout>
          <region id="rect3" top="110px" left="0px" 
            height="20px" width="240px" backgroundColor="red"/>
        </layout>
    </head>
    <body>
        <par dur="10s">
            <animate targetElement="rect3" 
                     attributeName="width" 
                     from="240" 
                     to="356" 
                     dur="5s" />
        </par>
    </body>
</smil>