How to make the animation smooth?
<p>I am trying to create a pre-loader which changer its height, width, border-radius and background color.</p>
<p>The animation works, but it has a pause between the changes. How to make the animation smoother?</p>
<p>The fiddle: <a href="https://jsfiddle.net/Altair827/ww077qby/4/" rel="nofollow noreferrer">https://jsfiddle.net/Altair827/ww077qby/4/</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>#preloader {
  margin-left: 300px;
  margin-top: 200px;
  height: 20px;
  width: 20px;
  border-radius: 10px;
  background-color: violet;
  -webkit-animation-name: colorIt;
          animation-name: colorIt;
  -webkit-animation-duration: 3s;
          animation-duration: 3s;
  -webkit-animation-fill-mode: both;
          animation-fill-mode: both;
}

@-webkit-keyframes colorIt {
  from {
    background-color: violet;
  }
  to 20%,40%,60%,80%,90%,99% {
    
  }
  20% {
    background-color: indigo;
    height: 40px;
    width: 40px;
    border-radius: 20px;
  }
  40% {
    background-color: blue;
    height: 50px;
    width: 50px;
    border-radius: 25px;
  }
  60% {
    background-color: green;
    height: 60px;
    width: 60px;
    border-radius: 30px;
  }
  80% {
    background-color: yellow;
    height: 70px;
    width: 70px;
    border-radius: 35px;
  }
  90% {
    background-color: orange;
    height: 80px;
    width: 80px;
    border-radius: 40px;
  }
  99% {
    background-color: red;
    height: 20px;
    width: 20px;
    border-radius: 10px;
  }
}

@keyframes colorIt {
  from {
    background-color: violet;
  }
  to 20%,40%,60%,80%,90%,99% {
    
  }
  20% {
    background-color: indigo;
    height: 40px;
    width: 40px;
    border-radius: 20px;
  }
  40% {
    background-color: blue;
    height: 50px;
    width: 50px;
    border-radius: 25px;
  }
  60% {
    background-color: green;
    height: 60px;
    width: 60px;
    border-radius: 30px;
  }
  80% {
    background-color: yellow;
    height: 70px;
    width: 70px;
    border-radius: 35px;
  }
  90% {
    background-color: orange;
    height: 80px;
    width: 80px;
    border-radius: 40px;
  }
  99% {
    background-color: red;
    height: 20px;
    width: 20px;
    border-radius: 10px;
  }
}</code></pre>
<pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;div id="preloader"&gt;&lt;/div&gt;</code></pre>
</div>
</div>
</p>