<smil>
  <head>
    <layout>
	<region id="r1" top="0" left="0" height="75" width="250"/>
	<region id="r2" top="75" left="0" height="98" width="250"/>
    </layout>
  </head>
  <body>
   <par>
    <audio src="http://smil.nist.gov/interop1/correct.wav"/>
    <seq>
       <img id="i1" src="http://smil.nist.gov/interop1/getout.jpg"
            begin="1s" dur="5s" region="r2"
       />
       <img src="http://smil.nist.gov/interop1/choose.jpg"
            region="r1" dur="5s"
            />
    </seq>
   </par>
  </body>
</smil>