title: How to create a right triangle gradient
body: <p>I am trying to create this as a gradient. <a href="https://jsfiddle.net/ojscg6fn/" rel="nofollow noreferrer">https://jsfiddle.net/ojscg6fn/</a></p>
  <p><a href="https://i.stack.imgur.com/FOhI1.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/FOhI1.png" alt="enter image description here" /></a></p>
  <p>I have a circle here, how do I create a right triangle gradient to place in the middle of the
  circle?</p>
  <p><a href="https://jsfiddle.net/79mjuhb2/" rel="nofollow noreferrer">https://jsfiddle.net/79mjuhb2/</a></p>
  <p><a href="https://i.stack.imgur.com/oTjct.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/oTjct.png" alt="enter image description here" /></a></p>
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-css lang-css prettyprint-override"><code>.play {
    -webkit-appearance: none;
    appearance: none;
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    width: 90px;
    height: 90px;
    cursor: pointer;
    /*background:
      linear-gradient(green 0 0),
      linear-gradient(green 0 0)
      blue;*/
    background-size:7px 100%,100% 7px;
    background-position:center;
    background-repeat:no-repeat;
    border: 9px solid red;
    border-radius: 50%;
    transform: rotate(45deg);
    }</code></pre>
  <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;button class="play" type="button" aria-label="Close"&gt;&lt;/button&gt;</code></pre>
  </div>
  </div>
  </p>