JSFiddle - React, Tailwind, and code Playground

CSS

body {
    background:
        linear-gradient(to bottom right, #fff, #fff 49.6%, #ccc 50.4%, #ccc) 0 0 no-repeat,
        linear-gradient(to bottom left, #fff, #fff 49.6%, #ccc 50.4%, #ccc) 100% 0 no-repeat, #ccc;
    background-size: 50% 60px;
}