$(document).ready(function(){
  for (var i=1; i <= $('.slider__slide').length; i++){
    $('.slider__indicators').append('<div class="slider__indicator" data-slide="'+i+'"></div>')
  }
  setTimeout(function(){
    $('.slider__wrap').addClass('slider__wrap--hacked');
  }, 1000);
})

function goToSlide(number){
  $('.slider__slide').removeClass('slider__slide--active');
  $('.slider__slide[data-slide='+number+']').addClass('slider__slide--active');
}

$('.slider__next, .go-to-next').on('click', function(){
  var currentSlide = Number($('.slider__slide--active').data('slide'));
  var totalSlides = $('.slider__slide').length;
  currentSlide++
  if (currentSlide > totalSlides){
    currentSlide = 1;
  }
  goToSlide(currentSlide);
})

  $('.sig').on('click', () => $('#myAudio').get(0).play());

body {
  background: #aaa;
  font-family: "Open Sans", sans-serif;
}

.slider {
  position: relative;
  height: 100vh;
  width: 100vw;
  background: #777;
  overflow: hidden;
}
.slider__wrap {
  position: absolute;
  width: 100vw;
  height: 100vh;
  transform: translateX(100vw);
  top: 0%;
  left: 0;
  right: auto;
  overflow: hidden;
  transition: transform 450ms cubic-bezier(0.785, 0.135, 0.15, 0.86);
  transform-origin: 0% 50%;
  transition-delay: 450ms;
  opacity: 0;
}
.slider__wrap--hacked {
  opacity: 1;
}
.slider__back {
  position: absolute;
  width: 100%;
  height: 100%;
  background-size: auto 100%;
  background-position: center;
  background-repeat: none;
  transition: filter 450ms cubic-bezier(0.785, 0.135, 0.15, 0.86);
}
.slider__inner {
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0;
  left: 0%;
  background-size: auto 133.3333%;
  background-position: center;
  background-repeat: none;
  transform: scale(0.75);
  transition: transform 450ms cubic-bezier(0.785, 0.135, 0.15, 0.86), box-shadow 450ms cubic-bezier(0.785, 0.135, 0.15, 0.86), opacity 450ms step-end;
  opacity: 0;
  box-shadow: 0 3vh 3vh rgba(0, 0, 0, 0);
  padding: 15vh;
  box-sizing: border-box;
}
.slider__content {
  position: relative;
  top: 50%;
  width: auto;
  transform: translateY(-50%);
  color: white;
  font-family: "Heebo", sans-serif;
  opacity: 0;
  transition: opacity 450ms;
}
.slider__content h1 {
  font-weight: 900;
  font-size: 9vh;
  line-height: 0.85;
  margin-bottom: 0.75vh;
  pointer-events: none;
  text-shadow: 0 0.375vh 0.75vh rgba(0, 0, 0, 0.1);
}
.slider__content a {
  cursor: pointer;
  font-size: 2.4vh;
  letter-spacing: 0.3vh;
  font-weight: 100;
  position: relative;
}
.slider__content a:after {
  content: "";
  display: block;
  width: 9vh;
  background: white;
  height: 1px;
  position: absolute;
  top: 50%;
  left: 6vh;
  transform: translateY(-50%);
  transform-origin: 0% 50%;
  transition: transform 900ms cubic-bezier(0.785, 0.135, 0.15, 0.86);
}
.slider__content a:before {
  content: "";
  border-top: 1px solid white;
  border-right: 1px solid white;
  display: block;
  width: 1vh;
  height: 1vh;
  transform: translateX(0) translateY(-50%) rotate(45deg);
  position: absolute;
  font-family: "Heebo", sans-serif;
  font-weight: 100;
  top: 50%;
  left: 15vh;
  transition: transform 900ms cubic-bezier(0.785, 0.135, 0.15, 0.86);
}
.slider__content a:hover:after {
  transform: scaleX(1.5);
  transition: transform 1200ms cubic-bezier(0.785, 0.135, 0.15, 0.86);
}
.slider__content a:hover:before {
  transform: translateX(6vh) translateY(-50%) rotate(45deg);
  transition: transform 1200ms cubic-bezier(0.785, 0.135, 0.15, 0.86);
}
.slider__slide {
  position: absolute;
  left: 0;
  height: 100vh;
  width: 100vw;
  transition: transform 600ms cubic-bezier(0.785, 0.135, 0.15, 0.86);
  transition-delay: 600ms;
  pointer-events: none;
  z-index: 0;
}
.slider__slide--active {
  transform: translatex(0%);
  z-index: 2;
}
.slider__slide--active .slider__wrap {
  transform: translateX(0);
  transform-origin: 100% 50%;
  opacity: 1;
  -webkit-animation: none;
          animation: none;
}
.slider__slide--active .slider__back {
  filter: blur(1.5vh);
  transition: filter 900ms cubic-bezier(0.785, 0.135, 0.15, 0.86);
  transition-delay: 900ms !important;
}
.slider__slide--active .slider__inner {
  transform: scale(0.8);
  box-shadow: 0 1vh 6vh rgba(0, 0, 0, 0.2);
  pointer-events: auto;
  opacity: 1;
  transition: transform 900ms cubic-bezier(0.785, 0.135, 0.15, 0.86), box-shadow 900ms cubic-bezier(0.785, 0.135, 0.15, 0.86), opacity 1ms step-end;
  transition-delay: 900ms;
}
.slider__slide--active .slider__content {
  opacity: 1;
  transition-delay: 1350ms;
}
.slider__slide:not(.slider__slide--active) .slider__wrap {
  -webkit-animation-name: hack;
          animation-name: hack;
  -webkit-animation-duration: 900ms;
          animation-duration: 900ms;
  -webkit-animation-delay: 450ms;
          animation-delay: 450ms;
  -webkit-animation-timing-function: cubic-bezier(0.785, 0.135, 0.15, 0.86);
          animation-timing-function: cubic-bezier(0.785, 0.135, 0.15, 0.86);
}
@-webkit-keyframes hack {
  0% {
    transform: translateX(0);
    opacity: 1;
  }
  50% {
    transform: translateX(-100vw);
    opacity: 1;
  }
  51% {
    transform: translateX(-100vw);
    opacity: 0;
  }
  52% {
    transform: translateX(100vw);
    opacity: 0;
  }
  100% {
    transform: translateX(100vw);
    opacity: 1;
  }
}
@keyframes hack {
  0% {
    transform: translateX(0);
    opacity: 1;
  }
  50% {
    transform: translateX(-100vw);
    opacity: 1;
  }
  51% {
    transform: translateX(-100vw);
    opacity: 0;
  }
  52% {
    transform: translateX(100vw);
    opacity: 0;
  }
  100% {
    transform: translateX(100vw);
    opacity: 1;
  }
}
.slider__slide:nth-child(1) .slider__back, .slider__slide:nth-child(1) .slider__inner {
  background-image: url(https://unsplash.it/1600/800/?image=931);
}
.slider__slide:nth-child(2) .slider__back, .slider__slide:nth-child(2) .slider__inner {
  background-image: url(https://unsplash.it/1600/800/?image=929);
}
.slider__slide:nth-child(3) .slider__back, .slider__slide:nth-child(3) .slider__inner {
  background-image: url(https://unsplash.it/1600/800/?image=927);
}

.sig {
  position: fixed;
  bottom: 8px;
  right: 8px;
  text-decoration: none;
  font-size: 12px;
  font-weight: 100;
  font-family: sans-serif;
  color: rgba(255, 255, 255, 0.4);
  letter-spacing: 2px;
  z-index: 9999;
  cursor: pointer;
}

<!DOCTYPE html>
<html lang="en" >
<head>
  <meta charset="UTF-8">
  <title>CodePen - Popout Slider</title>
  <meta name="viewport" content="width=device-width, initial-scale=1">
<link href="https://fonts.googleapis.com/css?family=Heebo:100,900|Open+Sans:300" rel="stylesheet">
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/normalize/5.0.0/normalize.min.css">
<link rel="stylesheet" href="./style.css">

</head>
<body>
<!-- partial:index.partial.html -->
<div class="slider">
  <div class="slider__slide slider__slide--active" data-slide="1">
    <div class="slider__wrap">
      <div class="slider__back"></div>
    </div>
    <div class="slider__inner">
      <div class="slider__content">
        <h1>Slide <br> One</h1><a class="go-to-next">next</a>
      </div>
    </div>
  </div>
  <div class="slider__slide" data-slide="2">
    <div class="slider__wrap">
      <div class="slider__back"></div>
    </div>
    <div class="slider__inner">
      <div class="slider__content">
        <h1>Slide <br> Two</h1><a class="go-to-next">next</a>
      </div>
    </div>
  </div>
  <div class="slider__slide" data-slide="3">
    <div class="slider__wrap">
      <div class="slider__back"></div>
    </div>
    <div class="slider__inner">
      <div class="slider__content">
        <h1>Slide <br> Three</h1><a class="go-to-next">next</a>
      </div>
    </div>
  </div>
  <div class="slider__indicators"></div>
</div>
<audio src="https://audio.code.org/win1.mp3" id="myAudio"></audio>
<a class="sig" role="button">PLAY MUSIC</a>
<!-- partial -->
  <script src='https://cdnjs.cloudflare.com/ajax/libs/jquery/3.1.0/jquery.min.js'></script><script  src="./script.js"></script>

</body>
</html>