JSFiddle - React, Tailwind, and code Playground

HTML

<div class="client-img"><a href="https://www.facebook.com/SAYHats"><img src="http://www.pretzcon.org/wp-content/uploads/2014/11/say_bw.png" height="150" width="190" class="img-swap" alt="&quot;Spin a Yarn&quot; by Sabrina "></a> 
</div>
<div class="client-img"><a href="http://www.animenebraskon.com/"><img src="http://www.pretzcon.org/wp-content/uploads/2014/11/nebcon_bw.png" height="150" width="190" class="img-swap" alt="Anime NebrasKon"></a> 
</div>
<div class="client-img"><a href="http://britishfest.weebly.com/"><img src="http://www.pretzcon.org/wp-content/uploads/2014/11/britishfest_bw.png" height="150" width="190" class="img-swap" alt="British Fest"></a> 
</div>
<div class="client-img"><a href="http://www.nuke-con.com/"><img src="http://www.pretzcon.org/wp-content/uploads/2014/11/nuke_bw.png" height="150" width="190" class="img-swap" alt="Nuke-Con"></a> 
</div>
<div class="client-img"><a href="http://www.osfes.org/"><img src="http://www.pretzcon.org/wp-content/uploads/2014/11/osfest_bw.png" height="150" width="190" class="img-swap" alt="OSFest"></a> 
</div>
<div class="client-img"><a href="http://spielbound.org/"><img src="http://www.pretzcon.org/wp-content/uploads/2014/11/spielbound_bw.png" height="150" width="190" class="img-swap" alt="Spielbound"></a> 
</div>

CSS

.client-img {
    text-align:center;
    overflow:hidden;
    margin-bottom:30px;
    width: 50%;
    float:left;
}