<collisionMovieData>
  <bounceArea width='200' height='200' />
  <circles>
    <circle radius='15' vel='random' col='random' />
    <circle radius='12' vel='random' col='random' />
    <circle radius='8' vel='random' col='random' />
    <circle radius='10' vel='random' col='random' />
    <circle radius='11' vel='random' col='random' />    
  </circles>
</collisionMovieData>  