JSFiddle - React, Tailwind, and code Playground
HTML
<div id="container">
<div class="copy">copy 1</div>
<div class="banner">banner 1</div>
<div class="copy">copy 1</div>
<div class="banner">banner 2</div>
<div class="copy">copy 1</div>
<div class="banner">banner 3</div>
<div class="banner">banner 4</div>
</div>
CSS
.banner:nth-of-type(1) {background-color:red;}
.banner:nth-of-type(2) {background-color:blue;}