<svg xmlns='http://www.w3.org/2000/svg'>
  <rect width='100' height='100'>
    <animateMotion to='100,0' dur='3s' />
  </rect>
  <text x='10' y='120'>
    The rect should from 0,0 to 100,0 over 3 seconds.
  </text>  
</svg>