JSFiddle - React, Tailwind, and code Playground

HTML

<div id="cross">
    <div id="cross-vertical">
    </div>
    <div id="cross-horizontal">
    </div>
</div>

CSS

#cross {
    position: relative;
    width: 150px;
    height: 150px;
    border: 1px solid black;
}

#cross div {
    position: absolute;
    background: red;
}

#cross-vertical {
    left: 50px;
    width: 33%;
    height: 100%;
}

#cross-horizontal {
    top: 33%;   
    width: 100%;
    height: 33%;
}