bootstrap 4 carousel multiple items responsive
<!-- Top content -->
<div class="top-content">
<div class="container-fluid">
<div id="carousel-example" class="carousel slide" data-ride="carousel">
<div class="carousel-inner row w-100 mx-auto" role="listbox">
<div class="carousel-item col-12 col-sm-6 col-md-4 col-lg-3 active">
<img src="assets/img/backgrounds/1.jpg" class="img-fluid mx-auto d-block" alt="img1">
</div>
<div class="carousel-item col-12 col-sm-6 col-md-4 col-lg-3">
<img src="assets/img/backgrounds/2.jpg" class="img-fluid mx-auto d-block" alt="img2">
</div>
<div class="carousel-item col-12 col-sm-6 col-md-4 col-lg-3">
<img src="assets/img/backgrounds/3.jpg" class="img-fluid mx-auto d-block" alt="img3">
</div>
<div class="carousel-item col-12 col-sm-6 col-md-4 col-lg-3">
<img src="assets/img/backgrounds/4.jpg" class="img-fluid mx-auto d-block" alt="img4">
</div>
<div class="carousel-item col-12 col-sm-6 col-md-4 col-lg-3">
<img src="assets/img/backgrounds/5.jpg" class="img-fluid mx-auto d-block" alt="img5">
</div>
<div class="carousel-item col-12 col-sm-6 col-md-4 col-lg-3">
<img src="assets/img/backgrounds/6.jpg" class="img-fluid mx-auto d-block" alt="img6">
</div>
<div class="carousel-item col-12 col-sm-6 col-md-4 col-lg-3">
<img src="assets/img/backgrounds/7.jpg" class="img-fluid mx-auto d-block" alt="img7">
</div>
<div class="carousel-item col-12 col-sm-6 col-md-4 col-lg-3">
<img src="assets/img/backgrounds/8.jpg" class="img-fluid mx-auto d-block" alt="img8">
</div>
</div>
<a class="carousel-control-prev" href="#carousel-example" role="button" data-slide="prev">
<span class="carousel-control-prev-icon" aria-hidden="true"></span>
<span class="sr-only">Previous</span>
</a>
<a class="carousel-control-next" href="#carousel-example" role="button" data-slide="next">
<span class="carousel-control-next-icon" aria-hidden="true"></span>
<span class="sr-only">Next</span>
</a>
</div>
</div>
</div>