    <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" id="d1" color="blue" width="200" height="100" top="5" left="5"/>
          <brush region="r" id="d2" color="blue" width="200" height="100" top="55" left="105"/>
          <animateColor attributeName="color" to="red" begin="2s" decelerate="1" autoReverse="true" repeatCount="5" dur="2s" targetElement="d1" additive="replace" calcMode="linear" fill="freeze"/>
          <animateColor attributeName="color" to="red" begin="2s" autoReverse="true" repeatCount="5" dur="2s" targetElement="d2" additive="replace" calcMode="linear" fill="freeze"/>
        </par>
      </body>
    </smil>