如何用滑块制作数字幻灯片？

$('.customer-logos').each(function() {

  var $this = $(this),
    $status = $this.closest('.section').find('.slider-num');


  $this.on('init reInit afterChange', function(event, slick, currentSlide, nextSlide) {

    var i = (currentSlide ? currentSlide : 0) + 1;
    $status.html('<strong>' + (((i) < 10) ? "0" + (i) : i) + '</strong>' + '<small>/' + (((slick.slideCount) < 10) ? "0" + (slick.slideCount) : slick.slideCount) + '</<small>');
  });

  $this.slick({
    slidesToShow: 6,
    slidesToScroll: 1,
    autoplay: true,
    autoplaySpeed: 1500,
    arrows: false,
    dots: false,
    pauseOnHover: false,
    focusOnSelect: true,
    responsive: [{
      breakpoint: 768,
      settings: {
        slidesToShow: 4
      }
    }, {
      breakpoint: 520,
      settings: {
        slidesToShow: 3
      }
    }]
  });
});

h2 {
  text-align: center;
  padding: 20px;
}


/* Slider */

.slick-slide {
  margin: 0px 20px;
}

.slick-slide img {
  width: 100%;
}

.slick-slider {
  position: relative;
  display: block;
  box-sizing: border-box;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
  -webkit-touch-callout: none;
  -khtml-user-select: none;
  -ms-touch-action: pan-y;
  touch-action: pan-y;
  -webkit-tap-highlight-color: transparent;
}

.slick-list {
  position: relative;
  display: block;
  overflow: hidden;
  margin: 0;
  padding: 0;
}

.slick-list:focus {
  outline: none;
}

.slick-list.dragging {
  cursor: pointer;
  cursor: hand;
}

.slick-slider .slick-track,
.slick-slider .slick-list {
  -webkit-transform: translate3d(0, 0, 0);
  -moz-transform: translate3d(0, 0, 0);
  -ms-transform: translate3d(0, 0, 0);
  -o-transform: translate3d(0, 0, 0);
  transform: translate3d(0, 0, 0);
}

.slick-track {
  position: relative;
  top: 0;
  left: 0;
  display: block;
}

.slick-track:before,
.slick-track:after {
  display: table;
  content: '';
}

.slick-track:after {
  clear: both;
}

.slick-loading .slick-track {
  visibility: hidden;
}

.slick-slide {
  display: none;
  float: left;
  height: 100%;
  min-height: 1px;
}

[dir='rtl'] .slick-slide {
  float: right;
}

.slick-slide img {
  display: block;
}

.slick-slide.slick-loading img {
  display: none;
}

.slick-slide.dragging img {
  pointer-events: none;
}

.slick-initialized .slick-slide {
  display: block;
}

.slick-loading .slick-slide {
  visibility: hidden;
}

.slick-vertical .slick-slide {
  display: block;
  height: auto;
  border: 1px solid transparent;
}

.slick-arrow.slick-hidden {
  display: none;
}

<script src="https://code.jquery.com/jquery-2.2.0.min.js" type="text/javascript"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/slick-carousel/1.6.0/slick.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js"></script>
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" rel="stylesheet">

<div class="section container">
  <h2>Our Partners</h2>
  <section class="customer-logos slider">
    <div class="slide"><img src="https://image.freepik.com/free-vector/luxury-letter-e-logo-design_1017-8903.jpg"></div>
    <div class="slide"><img src="https://image.freepik.com/free-vector/3d-box-logo_1103-876.jpg"></div>
    <div class="slide"><img src="https://image.freepik.com/free-vector/blue-tech-logo_1103-822.jpg"></div>
    <div class="slide"><img src="https://image.freepik.com/free-vector/colors-curl-logo-template_23-2147536125.jpg"></div>
    <div class="slide"><img src="https://image.freepik.com/free-vector/abstract-cross-logo_23-2147536124.jpg"></div>
    <div class="slide"><img src="https://image.freepik.com/free-vector/football-logo-background_1195-244.jpg"></div>
    <div class="slide"><img src="https://image.freepik.com/free-vector/background-of-spots-halftone_1035-3847.jpg"></div>
    <div class="slide"><img src="https://image.freepik.com/free-vector/retro-label-on-rustic-background_82147503374.jpg"></div>
  </section>
  <br>
  <div class="slider-num">
    <strong></strong>
    <small></small>
  </div>
</div>