
<smil xmlns="http://www.w3.org/2005/SMIL21/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>