JSFiddle - React, Tailwind, and code Playground
by petroveg
HTML
<div class="footer"></div>
CSS
.footer{
height: 300px;
background-color: rgba(0, 0, 0, .85);
background-image: linear-gradient(
-45deg,
transparent,
transparent 25%,
rgba(255, 255, 255, .5) 25%,
rgba(255, 255, 255, .5) calc(25% + 1px),
transparent calc(25% + 1px),
transparent 75%, rgba(255, 255, 255, .5) 75%,
rgba(255, 255, 255, .5) calc(75% + 1px),
transparent calc(75% + 1px),
transparent
);
background-size: 40px 40px;
}