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CSS

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HTML 

              
                .container
	header
		h1 A Clock Made Of Clocks
	.watch-container
		- for (i = 0; i < 4; i++)
			.watch-circle-container(id=`watch-circle-${i}`)
				- for(j = 0; j < 24; j++)
					span
	p.inspiration-text Inspired by&nbsp;
		a(
			href="https://twitter.com/latestengineer/status/1429761388591960065",
			target="_top"
		) this tweet
	.social-container
		a.social(href="https://twitter.com/fatihsolhann", target="_top") @fatihsolhann
		a.social(
			href="https://twitter.com/intent/tweet?text=a%20clock%20made%20of%20clocks.&url=https://codepen.io/solhan/pen/QWgwzmg&via=fatihsolhann",
			target="_top"
		) Share on twitter
!

CSS 

              
                *
	margin: 0
	padding: 0
	box-sizing: border-box
:root
	--circle-x: 4
	--circle-y: 6
	--circle-size: calc((100vw / calc(var(--circle-x) * 2)) - .5rem)
	@media (min-width: 480px)
		--circle-size: 50px

body
	background: #F9FAFB
	font-family: Inter, sans-serif
.container
	display: flex
	flex-direction: column
	justify-content: center
	align-items: center
	height: 100%
	header
		display: flex
		flex-direction: column
		justify-content: center
		align-items: center
		margin: 2rem 1rem 0
	h1
		font-size: clamp(1.5rem, 4vw, 4rem)
		font-weight: 700
		color: #1F2937
	
.watch-container
	display: grid
	grid-template-columns: repeat(2, calc(var(--circle-x) * var(--circle-size)))
	grid-template-rows: repeat(2, calc(var(--circle-y) * var(--circle-size)))
	margin-top: 2rem
.watch-circle-container
	display: grid
	grid-template-columns: repeat(var(--circle-x), var(--circle-size))
	grid-template-rows: repeat(var(--circle-y), var(--circle-size))
span
	font-size: var(--circle-size)
	width: 1em
	height: 1em
	border-radius: 50%
	display: block
	position: relative
	box-shadow: inset 1px -1px 2px 1px rgb(0 0 0 / 17%)
	overflow: hidden
	&:before,
	&::after
		content: ""
		position: absolute
		left: 0
		right: 0
		margin: 0 auto
		height: calc(var(--circle-size) / 2)
		width: 3px 
		background: #1F2937
		transition: 5s
		transform-origin: bottom
	&::before
		transform: rotate(var(--angle-1))
	&::after
		transform: rotate(var(--angle-2))
.inspiration-text
	margin-top: 3rem
	margin-left: 1rem

.social
	display: flex
	align-items: center
	height: 2.5rem
	padding: 0 1rem
	background: #1DA1F2
	border-radius: 2rem
	color: white
	text-decoration: none
	&:hover
		background: #0d76b7
	&:visited
		color: white
	& + .social
		margin-left: 1rem
		@media (min-width: 480px)
			margin-left: 2rem
	&-container
		display: flex
		align-items: center
		justify-content: center
		margin: 2rem 0
		flex-shrink: 0
!

JS 

              
                const digits = {
	0: [
		[90, 180],
		[90, 270],
		[90, 270],
		[180, 270],

		[0, 180],
		[90, 180],
		[180, 270],
		[0, 180],

		[0, 180],
		[0, 180],
		[0, 180],
		[0, 180],

		[0, 180],
		[0, 180],
		[0, 180],
		[0, 180],

		[0, 180],
		[0, 90],
		[0, 270],
		[0, 180],

		[0, 90],
		[90, 270],
		[90, 270],
		[0, 270]
	],
	1: [
		[90, 180],
		[90, 270],
		[180, 270],
		[225, 225],
		[0, 90],
		[180, 270],
		[180, 0],
		[225, 225],
		[225, 225],
		[180, 0],
		[180, 0],
		[225, 225],
		[225, 225],
		[180, 0],
		[180, 0],
		[225, 225],
		[90, 180],
		[270, 0],
		[0, 90],
		[180, 270],
		[90, 0],
		[90, 270],
		[270, 90],
		[0, 270]
	],
	2: [
		[180, 90],
		[90, 270],
		[90, 270],
		[270, 180],
		[0, 90],
		[90, 270],
		[270, 180],
		[180, 0],
		[180, 90],
		[270, 90],
		[0, 270],
		[180, 0],
		[0, 180],
		[180, 90],
		[270, 90],
		[270, 0],
		[180, 0],
		[0, 90],
		[270, 90],
		[180, 270],
		[0, 90],
		[270, 90],
		[270, 90],
		[270, 0]
	],
	3: [
		[180, 90],
		[90, 270],
		[90, 270],
		[270, 180],
		[0, 90],
		[90, 270],
		[270, 180],
		[180, 0],
		[180, 90],
		[270, 90],
		[0, 270],
		[180, 0],
		[90, 0],
		[270, 90],
		[180, 270],
		[180, 0],
		[90, 180],
		[270, 90],
		[0, 270],
		[180, 0],
		[0, 90],
		[270, 90],
		[270, 90],
		[270, 0]
	],
	4: [
		[180, 90],
		[180, 270],
		[225, 225],
		[225, 225],
		[0, 180],
		[180, 0],
		[225, 225],
		[225, 225],
		[0, 180],
		[180, 0],
		[180, 90],
		[180, 270],
		[0, 180],
		[0, 90],
		[0, 270],
		[180, 0],
		[0, 90],
		[270, 90],
		[180, 270],
		[180, 0],
		[225, 225],
		[225, 225],
		[0, 90],
		[270, 0]
	],
	5: [
		[180, 90],
		[90, 270],
		[90, 270],
		[270, 180],
		[180, 0],
		[180, 90],
		[90, 270],
		[270, 0],
		[0, 180],
		[0, 90],
		[90, 270],
		[270, 180],
		[0, 90],
		[90, 270],
		[270, 180],
		[180, 0],
		[180, 90],
		[270, 90],
		[0, 270],
		[180, 0],
		[0, 90],
		[270, 90],
		[270, 90],
		[270, 0]
	],
	6: [
		[180, 90],
		[90, 270],
		[90, 270],
		[270, 180],
		[0, 180],
		[90, 180],
		[270, 90],
		[0, 270],
		[180, 0],
		[0, 90],
		[270, 90],
		[180, 270],
		[180, 0],
		[90, 180],
		[270, 180],
		[0, 180],
		[0, 180],
		[0, 90],
		[270, 0],
		[180, 0],
		[0, 90],
		[270, 90],
		[270, 90],
		[270, 0]
	],
	7: [
		[180, 90],
		[270, 90],
		[270, 90],
		[270, 180],
		[90, 0],
		[270, 90],
		[270, 225],
		[225, 0],
		[225, 225],
		[45, 180],
		[45, 180],
		[225, 225],
		[225, 225],
		[0, 180],
		[0, 180],
		[225, 225],
		[225, 225],
		[0, 180],
		[0, 180],
		[225, 225],
		[225, 225],
		[0, 90],
		[0, 270],
		[225, 225]
	],
	8: [
		[180, 90],
		[90, 270],
		[90, 270],
		[270, 180],
		[180, 0],
		[90, 180],
		[270, 180],
		[180, 0],
		[180, 0],
		[90, 0],
		[0, 270],
		[180, 0],
		[0, 180],
		[180, 90],
		[180, 270],
		[0, 180],
		[180, 0],
		[90, 0],
		[270, 0],
		[180, 0],
		[0, 90],
		[90, 270],
		[270, 90],
		[270, 0]
	],
	9: [
		[180, 90],
		[90, 270],
		[90, 270],
		[270, 180],
		[0, 180],
		[90, 180],
		[270, 180],
		[180, 0],
		[180, 0],
		[0, 90],
		[0, 270],
		[180, 0],
		[0, 90],
		[90, 270],
		[180, 270],
		[0, 180],
		[90, 180],
		[90, 270],
		[0, 270],
		[180, 0],
		[0, 90],
		[270, 90],
		[270, 90],
		[270, 0]
	]
};

const set = (el, value) => {
	const spans = el.querySelectorAll("span");
	spans.forEach((span, index) => {
		span.style.setProperty("--angle-1", `${value[index][0]}deg`);
		span.style.setProperty("--angle-2", `${value[index][1]}deg`);
	});
};
setInterval(() => {
	const date = new Date();
	const [h1, h2] = date.getHours().toString().padStart(2, "0");
	const [m1, m2] = date.getMinutes().toString().padStart(2, "0");
	const time = [h1, h2, m1, m2];
	for (let i = 0; i < time.length; i++) {
		set(document.querySelector(`#watch-circle-${i}`), digits[time[i]]);
	}
}, 100);
!
999px

Console