<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="//code.jquery.com/jquery-1.11.1.min.js"></script>
<div class="container">
<div class="row">
<h2>Create your snippet's HTML, CSS and Javascript in the editor tabs</h2>
</div>
</div>
<section id="sec-1">
<div id="carouselExampleFade" class="carousel slide carousel-fade" data-ride="carousel" data-interval="false">
<div class="carousel-inner">
<div class="carousel-item active">
<img class="d-block w-100" src="https://cmkt-image-prd.global.ssl.fastly.net/0.1.0/ps/1842293/1160/772/m1/fpnw/wm0/preview_simplyworkz_email-.png?1478162493&s=fdff5f9bf4fa6db64edbc36ae99674bd" alt="First slide" style="background-color:yellow;">
</div>
<div class="carousel-item">
<img class="d-block w-100" src="https://cmkt-image-prd.global.ssl.fastly.net/0.1.0/ps/372080/1160/772/m1/fpnw/wm0/preview1-.jpg?1424739193&s=98777fa47fa01df379157d3090ddf489" alt="Second slide" style="background-color:red;">
</div>
<div class="carousel-item">
<img class="d-block w-100" src="https://cmkt-image-prd.global.ssl.fastly.net/0.1.0/ps/400986/1160/773/m1/fpnw/wm0/responsive-email-template-.png?1426257190&s=e27ee049a42f31f21178923d8ebe78bd" alt="Third slide" style="background-color:green;">
</div>
<div class="carousel-item">
<img class="d-block w-100" src="https://www.campaignmonitor.com/assets/uploads/2016/05/move-sections-B.png" alt="Third slide">
</div>
</div>
<a class="carousel-control-prev" href="#carouselExampleFade" role="button" data-slide="prev">
<span class="carousel-control-prev-icon" aria-hidden="true"></span>
<img src="" class="img-fluid" />
</a>
<a class="carousel-control-next" href="#carouselExampleFade" role="button" data-slide="next">
<span class="carousel-control-next-icon" aria-hidden="true"></span>
<img src="" class="img-fluid" />
</a>
</div>
</section>