JSFiddle - React, Tailwind, and code Playground

HTML

<div class="wrapper">
    <div class="left">
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    </div>
    <div class="right"></div>
    <div class="border"></div>
</div>

CSS

body {
    margin: 0;
    padding: 0;   
}

.wrapper {
    position: relative;
    background: black;
    color: #fff;
    overflow: hidden;
}

.left {
    width: 50%;
    float: left;
    position: relative;
    z-index: 3;
}

.right {
    width: 50%;
    height: 300px;
    float:left;
    z-index: 1;
    background: orange;
}

.border {
    position: absolute;
    height: 50px;
    top: 150px;
    left: 20px;
    right: 20px;
    z-index: 2;
    background: green;
}