JSFiddle - React, Tailwind, and code Playground

HTML

<div class="main">
    <div class="box"></div>
    <div class="box"></div>
    <div class="box"></div>
    <div class="box"></div>
    <div class="box"></div>
    <div class="box"></div>
    <div class="box"></div>
    <div class="box"></div>
</div>

CSS

.main{
    width:460px;
    height:240px;
}

.box{
    width:100px;
    height:100px;
    background:red;
    float:left;
    margin:10px;
}

/*.box:nth-child(n+4),.box:first-child{
    margin:10px 10px 10px 0;
}

.box:nth-child(4n){
    margin:10px 0px 10px 10px;
}*/