1 <svg xmlns='http://www.w3.org/2000/svg'>

     2   <rect width='100' height='100' fill='red' />

     3   <rect x='-100' width='100' height='100' fill='red'>

     4     <set attributeName='x' to='0' dur='3s' />

     5     <set attributeName='fill' to='green' dur='3s' />

     6   </rect>

     7   <text x='10' y='120'>

     8     There should be a 100x100 green rect at 0,0.

     9   </text>  

    10 </svg>