Comment by abirch

Yes

https://developer.mozilla.org/en-US/docs/Web/SVG/Reference/E...

  <svg viewBox="0 0 10 10" xmlns="http://www.w3.org/2000/svg">
  <rect width="10" height="10">
    <animate
      attributeName="rx"
      values="0;5;0"
      dur="10s"
      repeatCount="indefinite" />
  </rect>
  </svg>