JSFiddle - React, Tailwind, and code Playground

HTML

<div class="container">
    <div class="image"></div>
    <div class="image"></div>
    <div class="image"></div>
    <div class="image"></div>
    <div class="image last"></div>
    <div class="image last-row"></div>
    <div class="image last-row"></div>
    <div class="image last-row"></div>
    <div class="image last-row"></div>
    <div class="image last-row last"></div>
</div>

CSS

.container {
    padding: 5px;
    background-color: green;
    width: 70px;
    position: relative;
    overflow: hidden;
}

.image {
    margin-right: 5px;
    margin-bottom: 5px;
    float:left;
    width:10px;
    height:10px;
    background-color: red;
}

.last {
    margin-right: 0px;
}

.last-row {
    margin-bottom: 0px;
}