Carousel

<div class="col-sm-6 p-2 card card-secondary border-0 mx-auto">
  <div class="card card-block border-0 text-center rounded-0">
    <span class="text-muted">
        <div class="row mx-0">
          <div id="carouselExampleControls" class="carousel slide w-100" data-ride="carousel">
  <div class="carousel-inner">
<!-------IMG ONE--------->
    <div class="carousel-item active">
     <img class="d-block w-100" src="IMAGE_ONE">
    </div>
<!-------IMG TWO--------->
    <div class="carousel-item">
      <img class="d-block w-100" src="IMAGE_TWO">
    </div>
<!-------IMG THREE--------->
    <div class="carousel-item">
     <img class="d-block w-100" src="IMAGE_THREE">
    </div>
<!---------- copy + paste for more images
    <div class="carousel-item">
     <img class="d-block w-100" src="IMAGE_THREE">
    </div>
------------>
  </div>
<!-------CONTROLS--------->
  <a class="carousel-control-prev" href="#carouselExampleControls" 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="#carouselExampleControls" role="button" data-slide="next">
    <span class="carousel-control-next-icon" aria-hidden="true"></span>
    <span class="sr-only">Next</span>
 </span> </a> </div></div>

<!-------BUTTON--------->
  <a href="/LINK_HERE" class="btn btn-primary w-100 rounded-0 text-uppercase">Link to Gallery</a>
</div></div>