JSFiddle - React, Tailwind, and code Playground

by Felis Catus

HTML

<div class="test">
</div>

CSS

.test {
    position: absolute;
    left: 20px;
    top: 20px;
    width: 200px;
    height: 200px;
    border-style: solid;
    border-width: 2px 2px;
    border-image-source: linear-gradient(45deg, rgba(255,255,255,1), rgba(255,0,0,1), rgba(255,255,255,1), rgba(0,0,255,1), rgba(255,255,255,1));
    border-image-slice: 20;
    border-image-repeat: repeat;
    box-shadow: 0px 0px 10px black;
}

body {
    background-color: lightblue;
}