JSFiddle - React, Tailwind, and code Playground

HTML

<div class="container">
    <div class="segment"></div>
    <div class="segment"></div>
    <div class="segment"></div>
    <div class="segment"></div>
    <div class="segment"></div>
</div>

CSS

.segment {
    width: 20px;
    height: 20px;
    background: grey;
    border: 1px solid black;
    display: inline-block;
    padding: 0px;
    margin: 0px;
}

.container {
    padding: 0px;
    margin: 0px;
}