<div class="container">
  <div class="ball__container">
    <div class="ball__shadow"></div>
    <div class="ball"></div>
  </div>
</div>

<div class="actions">
  <button id="play">Play</button>
  <button id="pause">Pause</button>
  <button id="reverse">Reverse</button>
</div>

@import url("https://fonts.googleapis.com/css?family=Gochi+Hand");

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  width: 100vw;
  min-height: 100vh;
  margin: 0;
  background-color: #291642;
  font-family: "Gochi Hand", sans-serif;
  font-size: 100%;
  letter-spacing: 0.1rem;
  color: #fff;
  display: flex;
  flex-direction: column;
  align-items: center;

  background: linear-gradient(to right, #44ea76 0%, #39fad7 80%, #39fad7 100%)
      no-repeat,
    url("https://s3-us-west-2.amazonaws.com/s.cdpn.io/142996/slider-2.jpg")
      no-repeat fixed;
  background-size: cover;
  background-blend-mode: hue;
}

.container {
  flex: 1;
  min-height: 0;
  width: 100%;
  display: flex;
  align-items: center;
}

.actions {
  padding: 3vh;
  display: flex;
  justify-content: center;
  align-items: center;
  background-color: rgba(0, 0, 0, 0.5);
  width: 100%;
}

button {
  display: inline-flex;
  align-items: center;
  font-size: 1.2rem;
  height: 3rem;
  padding: 0.2rem 3.2rem;
  color: rgba(255, 255, 255, 0.8);
  background: #ff3366;
  border-radius: 10rem;
  border: none;
  cursor: pointer;
  margin: 0 2vh;
  transition: all 1s ease-in;
  transform-origin: center;
}

button:hover {
  box-shadow: inset 0 0 3px 5px currentColor;
  transform: rotate(2deg) skew(1deg, -1deg);
}

button:nth-child(2) {
  background-color: #2196f3;
}

button:nth-child(3) {
  background-color: #ff9800;
}

button:nth-child(4) {
  background-color: #795548;
}

.ball {
  position: absolute;
  height: 80px;
  width: 80px;
  border-radius: 50%;
  background: url("https://lh6.googleusercontent.com/-EHKsMyJ4Odg/VInMm3ZiLDI/AAAAAAAAAN0/AELrJLAfABU/s555-no/tao-hieu-ung-qua-bong-lan-bang-css3-animation.png")
    no-repeat center;
  background-size: cover;
  box-shadow: inset -10px -10px 10px rgba(0, 0, 0, 0.6);
  top: 0px;
  transform: scale(1, 1);
}

.ball__shadow {
  margin-top: 120px;
  margin-left: -8px;
  height: 100px;
  width: 100px;
  background-color: rgba(0, 0, 0, 0.6);
  filter: blur(8px);
  border-radius: 50px;
  transform: scale(0.4, 0.1);
  opacity: 0.3;
}

.ball__container {
  position: absolute;
  height: 200px;
  width: 82px;
  transform: translateX(0);
}

const ball = document.querySelector(".ball");
const ballShadow = document.querySelector(".ball__shadow");
const ballContainer = document.querySelector(".ball__container");

const handlePlay = document.getElementById("play");
const handlePause = document.getElementById("pause");
const handleReverse = document.getElementById("reverse");

const moveItKeyframesEffect = [
  {
    transform: "translateX(0)"
  },
  {
    transform: "translateX(100vw)"
  }
];

const moveItOptions = {
  duration: 8000,
  direction: "alternate",
  easing: "linear",
  iterations: Infinity
};

const scaleItKeyframesEffect = [
  { transform: "scale(0.4, 0.1)", opacity: 0.3 },
  { transform: "scale(1, 0.2)" }
];

const scaleItOptions = {
  duration: 500,
  direction: "alternate",
  easing: "cubic-bezier(.5,0,1,.5)",
  iterations: Infinity
};

const bounceKeyframesEffect = [
  { top: "0px", transform: "scale(1, 1)" },
  { transform: "scale(0.85, 1)", offset: 0.8 },
  { top: "120px", transform: "scale(1.2,0.6)" }
];

const bounceOptions = {
  duration: 500,
  direction: "alternate",
  easing: "cubic-bezier(.5,0,1,.5)",
  iterations: Infinity
};

const ballContainerAni = ballContainer.animate(
  moveItKeyframesEffect,
  moveItOptions
);
const ballShadowAni = ballShadow.animate(
  scaleItKeyframesEffect,
  scaleItOptions
);
const ballAni = ball.animate(bounceKeyframesEffect, bounceOptions);

handlePlay.addEventListener("click", () => {
  ballContainerAni.play();
  ballShadowAni.play();
  ballAni.play();
});

handlePause.addEventListener("click", () => {
  ballContainerAni.pause();
  ballShadowAni.pause();
  ballAni.pause();
});

handleReverse.addEventListener("click", () => {
  ballContainerAni.reverse();
  ballShadowAni.reverse();
  ballAni.reverse();
});