<div id="anime-demo">
  <div class="line">
    <div class="square"></div>
    <div class="square"></div>
    <div class="square"></div>
    <div class="square"></div>
    <div class="square"></div>
    <div class="square"></div>
    <div class="square"></div>
    <div class="square"></div>
    <div class="square"></div>
  </div>
</div>
<div class="controls">
<button class="play-easein">Play EaseIn Animations</button>
<button class="play-easeout">Play EaseOut Animations</button>
</div>

body {
  margin: 20px;
  font-family: 'Lato';
  font-weight: 300;
  font-size: 1.2em;
  text-align: center;
}

button {
  background: orange;
  color: white;
  margin: 5px;
  padding: 10px;
  border-radius: 4px;
  font-family: 'Lato';
  cursor: pointer;
  border: none;
  outline: none;
}

button:hover {
  background: blue;
}

.square {
  pointer-events: none;
  position: relative;
  width: 50px;
  height: 50px;
  background-color: black;
  margin: 4px;
  display: inline-block;
}

.controls {
  margin-top: 300px;
}

var easeInValues = ['easeInQuad', 'easeInCubic', 'easeInQuart', 'easeInQuint', 'easeInSine', 'easeInExpo', 'easeInCirc', 'easeInBack', 'easeInElastic'];

var easeOutValues = ['easeOutQuad', 'easeOutCubic', 'easeOutQuart', 'easeOutQuint', 'easeOutSine', 'easeOutExpo', 'easeOutCirc', 'easeOutBack', 'easeOutElastic'];

var easeInSequence = anime({
  targets: '.square',
  translateY: 250,
  duration: 2000,
  easing: function(target, index) {
    return easeInValues[index];
  },
  autoplay: false
});

var easeOutSequence = anime({
  targets: '.square',
  translateY: 250,
  duration: 2000,
  easing: function(target, index) {
    return easeOutValues[index];
  },
  autoplay: false
});

document.querySelector('.play-easein').onclick = easeInSequence.restart;
document.querySelector('.play-easeout').onclick = easeOutSequence.restart;