I think they automatically add slider on each div
see the codepen solution here:
HTML
<div class="carousel"
data-flickity='{ "wrapAround": true }'>
<div class="carousel-cell"></div>
<div class="carousel-cell"></div>
<div class="carousel-cell"></div>
<div class="carousel-cell"></div>
<div class="carousel-cell"></div>
<div class="carousel-cell"></div>
<div class="carousel-cell"></div>
<div class="carousel-cell"></div>
</div>
CSS
* { box-sizing: border-box; }
body { font-family: sans-serif; }
.carousel {
background: #EEE;
}
.carousel-cell {
width: 66%;
height: 200px;
margin-right: 10px;
background: #8C8;
border-radius: 5px;
counter-increment: carousel-cell;
}
.carousel-cell:before {
display: block;
text-align: center;
content: counter(carousel-cell);
line-height: 200px;
font-size: 80px;
color: white;
}