<h1>Principle 7: Arc (1)</h1>
<h2><a href="https://cssanimation.rocks/principles/" target="_parent">Animation Principles for the Web</h2>
<article class="principle sevena">
    <div class="shape-container">
      <div class="shape a"></div>
    </div>
  </article>

/******* SEVEN A (Arc) *******/
.sevena .shape-container {
  animation: move-right 6s infinite cubic-bezier(.37,.55,.49,.67);
  position: absolute;
  left: calc(50% - 4em);
  top: calc(50% - 4em);
}
.sevena .shape {
  animation: bounce 6s infinite linear;
  border-radius: 50%;
  position: relative;
  left: auto;
  top: auto;
}

@keyframes move-right {
  0% {
    transform: translateX(-20em);
    opacity: 1;
  }
  80% {
    opacity: 1;
  }
  90%, 100% {
    transform: translateX(20em);
    opacity: 0;
  }
}

@keyframes bounce {
  0% {
    transform: translateY(-8em);
    animation-timing-function: cubic-bezier(.51,.01,.79,.02);
  }
  15% {
    transform: translateY(8em);
    animation-timing-function: cubic-bezier(.19,1,.7,1);
  }
  25% {
    transform: translateY(-4em);
    animation-timing-function: cubic-bezier(.51,.01,.79,.02);
  }
  32.5% {
    transform: translateY(8em);
    animation-timing-function: cubic-bezier(.19,1,.7,1);
  }
  40% {
    transform: translateY(0em);
    animation-timing-function: cubic-bezier(.51,.01,.79,.02);
  }
  45% {
    transform: translateY(8em);
    animation-timing-function: cubic-bezier(.19,1,.7,1);
  }
  50% {
    transform: translateY(3em);
    animation-timing-function: cubic-bezier(.51,.01,.79,.02);
  }
  56% {
    transform: translateY(8em);
    animation-timing-function: cubic-bezier(.19,1,.7,1);
  }
  60% {
    transform: translateY(6em);
    animation-timing-function: cubic-bezier(.51,.01,.79,.02);
  }
  64% {
    transform: translateY(8em);
    animation-timing-function: cubic-bezier(.19,1,.7,1);
  }
  66% {
    transform: translateY(7.5em);
    animation-timing-function: cubic-bezier(.51,.01,.79,.02);
  }
  70%, 100% {
    transform: translateY(8em);
    animation-timing-function: cubic-bezier(.19,1,.7,1);
  }
}

/* General styling */
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);
}