JSFiddle - React, Tailwind, and code Playground

HTML

<div id="triangle-top"></div>
<div style="margin-left:-50px" id="triangle-bottom"></div>
<div style="margin-left:-50px" id="triangle-top"></div>

CSS

#triangle-top{
    width: 0px;
    height: 0px;
    border-left: 60px solid transparent;
    border-right: 60px solid transparent;
    border-bottom: 100px solid #FF0000;    
}

#triangle-bottom {
    width: 0px;
    height: 0px;
    border-left: 60px solid transparent;
    border-right: 60px solid transparent;
    border-top: 100px solid #FF0000;
}

div{
    float:left;
    cursor:pointer;
    border-radius:2px;
}