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<h1>Principle 1: Squash and stretch</h1>
<h2><a href="https://cssanimation.rocks/principles/" target="_parent">Animation Principles for the Web</h2>
<article class="principle one">
    <div class="shape"></div>
    <div class="surface"></div>
  </article>
.one .shape {
  animation: one 4s infinite ease-out;
}

.one .surface {
  background: #000;
  height: 10em;
  width: 1em;
  position: absolute;
  top: calc(50% - 4em);
  left: calc(50% + 10em);
}

@keyframes one {
  0%, 15% {
    opacity: 0;
  }
  15%, 25% {
    transform: none;
    animation-timing-function: cubic-bezier(1,-1.92,.95,.89);
    width: 4em;
    height: 4em;
    top: calc(50% - 2em);
    left: calc(50% - 2em);
    opacity: 1;
  }
  35%, 45% {
    transform: translateX(8em);
    height: 6em;
    width: 2em;
    top: calc(50% - 3em);
    animation-timing-function: linear;
    opacity: 1;
  }
  70%, 100% {
    transform: translateX(8em) translateY(5em);
    height: 6em;
    width: 2em;
    top: calc(50% - 3em);
    opacity: 0;
  }
}

body {
  margin: 0;
  background: #e9b59f;
  font-family: HelveticaNeue, Arial, Sans-serif;
  color: #fff;
}

h1 {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  text-align: center;
  font-weight: 300;
}

h2 {
  font-size: 0.75em;
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  text-align: center;
}

a {
  text-decoration: none;
  color: #333;
}

.principle {
  width: 100%;
  height: 100vh;
  position: relative;
}

.shape {
  background: #2d97db;
  border: 1em solid #fff;
  width: 4em;
  height: 4em;
  position: absolute;
  top: calc(50% - 2em);
  left: calc(50% - 2em);
}
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