html, body {
	background-size: 15px 15px;
	background-position: center center;
	overflow: hidden;
}
html {
	background-color: dimgray;
	background-image: radial-gradient(black, black 5.5px, dimgray 0);
	height: 100vh;
}
body {
	position: absolute;
	top: -50vw;
	bottom: -50vw;
	right: -50vh;
	left: -50vh;
	background-color: transparent;
	background-image: radial-gradient(transparent, transparent 5px, black 0);
	animation: 20s rotate infinite ease-in-out;
}
@keyframes rotate {
	to {
		transform: rotate(90deg);
	}
}