JSFiddle - React, Tailwind, and code Playground

HTML

<div class="tv-static"></div>

CSS

html,
body {
  width: 100%;
  height: 100%;
  display: flex;
}

.tv-static {
  width: 500px;
  height: 300px;
  margin: auto;
  background-image: repeating-conic-gradient(white, black 0.00085%);
  animation: back 25s linear infinite;
}

@keyframes back {
    from {
    background-size: 100% 100%;
  }
  to {
    background-size: 200% 200%;
  }
}