<button class="play">Play</button>
<div class="container">
</div>

body {
  margin: 20px auto;
  font-family: "Lato";
  font-weight: 300;
  width: 600px;
  font-size: 1.3em;
}

.container {
  perspective: 100px;
  height: 300px;
}

button {
  background: orange;
  border: none;
  color: white;
  font-family: 'Lato';
  padding: 10px 15px;
  cursor: pointer;
  outline: none;
  margin: 10px;
  font-weight: 300;
}

var polyA = new mojs.Shape({
  parent: ".container",
  shape: "polygon",
  className: 'yay',
  fill: "red",
  stroke: "black",
  isShowStart: true,
  points: 4,
  left: 100,
  x: {
    0: 500
  },
  strokeWidth: {
    5: 2
  },
  duration: 2000,
  easing: 'elastic.in'
}).then({
  strokeWidth: 5,
  points: {
    4: 3
  },
  angle: {
    0: 720
  },
  scale: {
    1: 2
  },
  fill: {
    'red': 'yellow'
  },
  duration: 1000,
  delay: 200,
  easing: 'elastic.out'
});

document.querySelector(".play").addEventListener("click", function() {
  polyA.play();
});