<!-- START -->
<div id="carouselExampleIndicators" class="carousel slide" data-ride="carousel">
    <ol class="carousel-indicators">
        {{range $num,$a := .pic_set}}
            {{if eq $num 0 }}
        <li data-target="#carouselExampleIndicators" data-slide-to="0" class="active"></li>
            {{ else }}
        <li data-target="#carouselExampleIndicators" data-slide-to="{{$num}}"></li>
            {{ end }}
        {{end}}
    </ol>
    <div class="carousel-inner">
        {{range $num,$a := .pic_set}}
        {{if eq $num 0 }}
        <div class="carousel-item active">
            <img src="{{$a}}" class="d-block w-100 pic-in-set" alt="{{add $num 1}}">
        </div>
        {{else}}
        <div class="carousel-item">
            <img src="{{$a}}" class="d-block w-100 pic-in-set" alt="{{add $num 1}}">
        </div>
        {{end}}
        {{end}}
    </div>
    <a class="carousel-control-prev" href="#carouselExampleIndicators" 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="#carouselExampleIndicators" role="button" data-slide="next">
        <span class="carousel-control-next-icon" aria-hidden="true"></span>
        <span class="sr-only">Next</span>
    </a>
</div>