JSFiddle - React, Tailwind, and code Playground

HTML

<div class="main">
     <div>one</div>
     <div>two</div>
     <div>three</div>
     <div>four</div>
     <div>five</div>
     <div>six</div>
     <div>seven</div>
     <div>eight</div>
     <div>nine</div>
     <div>ten</div>
     <div>eleven</div>
     <div>twelve</div>
     <div>thirteen</div>
     <div>fourteen</div>
     <div>fifteen</div>
</div>

CSS

.main div{float:right; width:70px;}
.main div:nth-child(6n+7){clear:right;}