palemoon-dev/platform/image/test/mochitest/lime-anim-100x100.svg

<svg xmlns="http://www.w3.org/2000/svg" version="1.1"
     width="100" height="100">
  <rect width="100%" height="100%" fill="red"/>
  <rect x="-600" width="100%" height="100%" fill="lime">
    <animate attributeName="x" by="600" dur="0.1" fill="freeze"/>
  </rect>
</svg>