    <smil xmlns="http://www.w3.org/2001/SMIL20/Language">
      <head>
        <layout>
          <root-layout backgroundColor="#eeffcc" width="640" height="480"/>
          <region id="r" fit="fill"/>
        </layout>
      </head>
      <body>
        <par dur="indefinite">
          <brush region="r" dur="indefinite" id="d1" color="blue" width="150" height="150" >
            <set attributeName="width" to="350" begin="2" dur="2"/>
          </brush>
        </par>
      </body>
    </smil>