<link href="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css">
<script src="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/js/bootstrap.min.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<div class="strip-outer">
<div class="strip-inner">
<div class="draggable"></div>
<div class="strip">
<div class="strip__item">
<div class="img-outer img-outer--size-s"><div class="img-inner" style="background-image:url('img/1.jpg');"></div></div>
<span class="strip__item-number"><a class="strip__item-link"><span>01</span></a><span class="strip__item-plus"></span></span>
</div>
<div class="strip__item">
<div class="img-outer img-outer--size-m"><div class="img-inner" style="background-image:url('img/2.jpg');"></div></div>
<span class="strip__item-number"><a class="strip__item-link"><span>02</span></a><span class="strip__item-plus"></span></span>
</div>
<div class="strip__item">
<div class="img-outer img-outer--size-xl"><div class="img-inner" style="background-image:url('img/3.jpg');"></div></div>
<span class="strip__item-number"><a class="strip__item-link"><span>03</span></a><span class="strip__item-plus"></span></span>
</div>
<div class="strip__item">
<div class="img-outer img-outer--size-l"><div class="img-inner" style="background-image:url('img/4.jpg');"></div></div>
<span class="strip__item-number"><a class="strip__item-link"><span>04</span></a><span class="strip__item-plus"></span></span>
</div>
<div class="strip__item">
<div class="img-outer img-outer--size-s"><div class="img-inner" style="background-image:url('img/5.jpg');"></div></div>
<span class="strip__item-number"><a class="strip__item-link"><span>05</span></a><span class="strip__item-plus"></span></span>
</div>
<div class="strip__item">
<div class="img-outer img-outer--size-m"><div class="img-inner" style="background-image:url('img/6.jpg');"></div></div>
<span class="strip__item-number"><a class="strip__item-link"><span>06</span></a><span class="strip__item-plus"></span></span>
</div>
<div class="strip__item">
<div class="img-outer img-outer--size-s"><div class="img-inner" style="background-image:url('img/7.jpg');"></div></div>
<span class="strip__item-number"><a class="strip__item-link"><span>07</span></a><span class="strip__item-plus"></span></span>
</div>