    <smil xmlns="http://www.w3.org/2001/SMIL20/Language">
      <head>
        <layout>
          <root-layout backgroundColor="white" width="640" height="480"/>
          <region height="100" width="100" id="timedElement" backgroundColor="#ffffff" />
          <region id="r" fit="fill"/>
        </layout>
      </head>
      <body>
        <par dur="indefinite">
          <animateColor id="a1" targetElement="timedElement" attributeName="backgroundColor" begin="1" dur="2s" additive="replace" from="#ff0000" to="#0000ff" fill="hold" calcMode="paced"/>
          <text region="r" left="0%" top="80%" width="100%" height="20%" dur="20s" fit="hidden"
                src="data:,animateColor%20id=%22a1%22%20targetElement=%22timedElement%22%20attributeName=%22backgroundColor%22%20begin=%221%22%20dur=%222s%22%20additive=%22replace%22%20from=%22%23ff0000%22%20to=%22%230000ff%22%20fill=%22hold%22%20calcMode=%22paced%22"/>
        </par>
      </body>
    </smil>