title: SVG animation delay on each repetition
body: <p>I'd like to add a delay to each iteration of an SVG animation loop. Here's a simple example.</p>
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="false" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;svg xmlns="http://www.w3.org/2000/svg" width="100px" height="100px"&gt;
    &lt;circle cx="50" cy="50" r="15" fill="blue"&gt;
      &lt;animate id="op" attributeType="CSS" attributeName="opacity"
               from="1" to="0" dur="3s" repeatCount="indefinite" /&gt;
    &lt;/circle&gt;
  &lt;/svg&gt;</code></pre>
  </div>
  </div>
  </p>
  <p>Using <code>begin</code> only delays the first iteration, so, is there a way to delay <em>every</em> iteration?</p>