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CSS

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HTML 

              
                 <a href="/" class="logo"><img src="//cssanimation.rocks/images/logo.svg"></a>
  <article class="wwdc">
    <span class="spin">
      <!-- Large Circles -->
      <div class="large circle one"></div>
      <div class="large circle two"></div>
      <div class="large circle three"></div>
      <div class="large circle four"></div>
      <div class="large circle five"></div>
      <div class="large circle six"></div>
      <div class="large circle seven"></div>
      <div class="large circle eight"></div>
    </span>
    <span class="pulse">
      <!-- Small Shapes -->
      <div class="small circle one"></div>
      <div class="small squircle two"></div>
      <div class="small circle three"></div>
      <div class="small squircle four"></div>
      <div class="small circle five"></div>
      <div class="small squircle six"></div>
      <div class="small circle seven"></div>
      <div class="small squircle eight"></div>
    </span>
      <!-- Squircles -->
      <span class="spin-reverse">
        <div class="large squircle one"></div>
      </span>
      <div class="large squircle two">
        <div class="content">
          <svg viewBox="0 0 160 164" xmlns="http://www.w3.org/2000/svg">
         <g>
          <g id="svg_1">
           <path d="m127.805969,90.003128c0.224838,24.213104 21.241287,32.270615 21.474121,32.373459c-0.177704,0.56826 -3.358078,11.482742 -11.072464,22.756622c-6.668747,9.746841 -13.590027,19.457977 -24.493088,19.659103c-10.713348,0.197403 -14.158287,-6.353043 -26.406677,-6.353043c-12.24469,0 -16.072174,6.151901 -26.213551,6.550446c-10.52422,0.398254 -18.538303,-10.539917 -25.26247,-20.251053c-13.740021,-19.864456 -24.24024,-56.132286 -10.1411,-80.613663c7.004152,-12.157551 19.521101,-19.85622 33.10713,-20.053638c10.334515,-0.197132 20.089069,6.952717 26.406689,6.952717c6.313614,0 18.167473,-8.59832 30.628998,-7.335548c5.21682,0.217129 19.860519,2.1073 29.263641,15.871029c-0.75766,0.469692 -17.472931,10.200527 -17.291229,30.443592m-20.134499,-59.456692c5.587379,-6.7633 9.348007,-16.178439 8.322067,-25.546439c-8.053787,0.32369 -17.792625,5.36682 -23.569427,12.126399c-5.177124,5.985922 -9.711121,15.566772 -8.48777,24.749359c8.976891,0.69453 18.147476,-4.561718 23.73513,-11.329308"/>
          </g>
         </g>
        </svg>
        <h1>The epicenter of change.</h1>
        <p><strong>WWDC</strong>15</p>
      </div>
    </div>
  </article>
  <p class="message">Learn how to do this and other CSS animation<br><a href="//cssanimation.rocks/courses/animation-101/" target="_blank">Join my email course</a></p>
!

CSS 

              
                .logo {
  width: 8em;
  position: absolute;
  left: 1em;
  top: 1em;
}

span {
  display: block;
  position: absolute;
  top: calc(50% - 10em);
  left: calc(50% - 10em);
  width: 20em;
  height: 20em;
}

span.spin {
  animation: spin 10s linear infinite;
}

span.spin-reverse {
  animation: spin 30s linear infinite;
}

span.pulse {
  animation: spin-pulse 20s linear infinite;
}

@keyframes spin {
  0% {
    transform: rotateZ(0);
  }
  100% {
    transform: rotateZ(360deg);
  }
}

@keyframes spin-pulse {
  0% {
    transform: scale(1) rotateZ(0);
  }
  50% {
    transform: scale(0.9) rotateZ(180deg);
  }
  100% {
    transform: scale(1) rotateZ(360deg);
  }
}

body {
  background: #fff;
  font-family: 'HelveticaNeue-Light', 'Helvetica Neue Light', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  color: #fff;
  font-size: 24px;
}

.circle {
  border-radius: 50%;
  left: calc(50% - 6.25em);
  top: calc(50% - 12.5em);
  transform-origin: 50% 12.5em;
}

.squircle {
  border-radius: 25%;
}

.circle, .squircle {
  width: 12.5em;
  height: 12.5em;
  position: absolute;
  border-top: 0.1em solid rgba(255,255,255,0.4);
}

.large.circle {
  box-shadow: 0 1em 2em rgba(0,0,0,0.5);
}

.small {
  width: 4em;
  height: 4em;
  left: calc(50% - 2em);
  top: calc(50% - 15em);
  transform-origin: 50% 15em;
  box-shadow: 0 0.25em 0.5em rgba(0,0,0,0.2);
}

$transparency: 0.75;

.one {
  background: rgba(16, 63, 236, $transparency);
  transform: rotateZ(225deg);
}
.two {
  background: rgba(37, 172, 162, $transparency);
  transform: rotateZ(180deg);
}
.three {
  background: rgba(233, 124, 32, $transparency);
  transform: rotateZ(135deg);
}
.four {
  background: rgba(235, 67, 35, $transparency);
  transform: rotateZ(90deg);
}
.five {
  background: rgba(190, 28, 65, $transparency);
  transform: rotateZ(45deg);
}
.six {
  background: rgba(208, 57, 159, $transparency);
  transform: rotateZ(0);
}
.seven {
  background: rgba(150, 32, 198, $transparency);
  transform: rotateZ(-45deg);
}
.eight {
  background: rgba(95, 33, 203, $transparency);
  transform: rotateZ(-90deg);
}

.small.squircle {
  background: none;
  box-shadow: none;

  &::after {
    content: "";
    border-radius: 25%;
    width: 100%;
    height: 100%;
    position: absolute;
    background: red;
    transform: rotateZ(-45deg);
    box-shadow: -0.25em 0.25em 0.5em rgba(0,0,0,0.2);
  }

  &.two::after {
    background: rgba(37, 172, 162, $transparency);
  }
  &.four::after {
    background: rgba(235, 67, 35, $transparency);
  }
  &.six::after {
    background: rgba(208, 57, 159, $transparency);
  }
  &.eight::after {
    background: rgba(95, 33, 203, $transparency);
  }
}

.large.squircle {
  position: absolute;
  background: rgba(30, 7, 66, 0.65);
  border: none;
  left: calc(50% - 7.5em);
  top: calc(50% - 7.5em);
  width: 15em;
  height: 15em;
  transform: none;

  &.one {
    transform: rotateZ(45deg);
  }
}

.content {
  text-align: center;

  svg {
    fill: #fff;
    width: 3em;
    margin: 1.25em auto 1em;
  }

  h1 {
    font-weight: lighter;
    font-size: 1.75em;
    margin: 0.25em auto 1em;
    max-width: 6em;
  }

}

.message {
  position: absolute;
  left: 1em;
  bottom: 1em;
  right: 0;
  color: #222;
  text-align: left;

  a {
    text-decoration: none;
    font-weight: bold;
    color: #999;
  }
}
!

JS 

              
                /* CSSAnimation.rocks

Learn all about CSS animation with my email course: https://cssanimation.rocks/courses/animation-101/

*/
!
999px

Console