Google-style Loading Animation using css keyframers

This is a Loading Animation Concept on Google Style inspired by those cool animations made for Google Home App!. This tricky tumbling transform-origin animation using only CSS.

HTML Snippet

<div id="app">
  <div class="boxes">
    <div class="box -blue"></div>
    <div class="box -red"></div>
    <div class="box -yellow"></div>
    <div class="box -green"></div>
  </div>
</div>

CSS Code

#app {
  -webkit-animation-duration: 2s;
          animation-duration: 2s;
  -webkit-animation-timing-function: cubic-bezier(0.6, 0, 0.4, 1);
          animation-timing-function: cubic-bezier(0.6, 0, 0.4, 1);
  -webkit-animation-iteration-count: infinite;
          animation-iteration-count: infinite;
  -webkit-animation-fill-mode: both;
          animation-fill-mode: both;
  will-change: transform;
}

.boxes {
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: 1fr 1fr;
  height: 25vmin;
  width: 25vmin;
  background: #eee;
  background-image: radial-gradient(circle at center, #FFF 45%, transparent 45%), linear-gradient(to right, transparent 49.99%, #ccc 50%);
}

.boxes,
.box {
  -webkit-animation: inherit;
          animation: inherit;
}


*, *:before, *:after {
  box-sizing: border-box;
  position: relative;
}

html, body {
  height: 100%;
  width: 100%;
  margin: 0;
  padding: 0;
}

body {
  display: flex;
  justify-content: center;
  align-items: center;
}

Preview