<smil>
  <head>
    <layout>
      <root-layout height="173" width="250" background-color="green"/>
	<region id="c2" top="75" left="0" height="98" width="250"/>
      <region id="c1" top="0" left="0" height="75" width="250"/> 
    </layout>
  </head>
  <body>
    <seq>
       <img 
            src="http://smil.nist.gov/interop1/getout.jpg"
            dur="2s" region="c2"
       />
       <img 
            src="http://smil.nist.gov/interop1/choose.jpg"
            dur="2s" region="c1"
       />
      <par dur="4s">
        <img id="i1"
             src="http://smil.nist.gov/interop1/getout.jpg"
 		 region="c2"
        />
        <img id="i2"
             src="http://smil.nist.gov/interop1/choose.jpg"
             begin="2s"
             region="c1"
        />
      </par>
    </seq>
  </body>
</smil>