JSFiddle - React, Tailwind, and code Playground

HTML

<div class="wrapper">
    <div class="inner"></div>
    <div class="inner"></div>
    <div class="inner"></div>
    <div class="inner"></div>
    <div class="inner"></div>
    <div class="inner"></div>
</div>

CSS

.wrapper {
    width: 100px;
    height: 100px;
    background: #ccc;
    
    overflow: hidden;
}

.inner {
    height: 30px;
    width: 90px;
    background: #0000ff;
    border: 1px solid #00ff00;
}

.inner:before {
    width: 72px;
    height: 28px;
    content: '';
    display: block;
    border: 3px solid rgb(255, 0, 0);
    position: absolute;
}