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HTML 

              
                <div class="wrapper">
	<main></main>		
</div>
!

CSS 

              
                html {
	font-size: 0.75vmin;
}

body {
	background-image: linear-gradient(to bottom, #131313, #000);
	perspective: 45rem;
	transform-style: preserve-3d;
}

.wrapper {
	animation: camera-rotate 40s ease-in-out forwards infinite;
	width: 100%;
	height: 100%;
	transform-style: preserve-3d;
}

main {
	--s: 100%;
	--l: 50%;
	display: flex;
	color: hsl(210deg, var(--s), var(--l));
	gap: 1rem;
	width: 100%;
	height: 100%;
	position: relative;
	align-items: center;
	justify-content: center;
	animation-composition: add;
	/* for hue rotate(laggy thou) */
	// animation: camera-rotate 40s ease-in-out forwards infinite, 
	// 	hue-rotate 70s linear -40s forwards infinite;
	animation: camera-pan 30s linear forwards infinite;
	translate: 0rem 1rem 10rem;
	transform-style: preserve-3d;
	
	.digits {
		transform-style: preserve-3d;
		
		.group {
			display: flex;
			gap: 2rem;
			
			.digit {
				position: relative;
				height: 16rem;
				aspect-ratio: 1/2;
				filter: drop-shadow(0px 0px 4px currentColor) drop-shadow(0px 0px 10px currentColor);

				span {
					--act: 0;
					--signX: 1;
					--signY: 1;
					position: absolute;
					background-color: white;
					transition: all .3s cubic-bezier(.17,.67,.5,1.15);
					opacity: calc(0.03 + 0.97 * var(--act));
					animation-composition: add;
					transform: scale(var(--signX), var(--signY));

					&.end {
						clip-path: polygon(15% 0%, 7.5% 20%, 25% 100%, 75% 100%, 92.5% 20%, 85% 0%);
						width: 100%;
						height: 10%;

						&.top {
							top: 0;
						}

						&.bottom {
							top: initial;
							bottom: 0;
							--signY: -1;
						}
					}

					&.side {
						clip-path: polygon(0% 15%, 20% 7.5%, 100% 22.5%, 100% 85%, 20% 95%, 0% 90%);
						height: 50%;
						width: 20%;

						&.left {
							top: 0;
							left: 0;

							&.bottom {
								top: initial;
								bottom: 0;
								--signY: -1;
							}
						}

						&.right {
							top: 0;
							left: initial;
							right: 0;
							--signX: -1;

							&.bottom {
								top: initial;
								--signY: -1;
								bottom: 0;
							}
						}
					}

					&.middle {
						clip-path: polygon(22.5% 0%, 6.5% 50%, 22.5% 100%, 77.5% 100%, 93.5% 50%, 77.5% 0%);
						top: 45%;
						height: 10%;
						width: 100%;
					}
				}

				&[data-digit="0"] {
					:not(.middle) {
						--act: 1;
					}
				}

				&[data-digit="1"] {
					.right {
						--act: 1;
					}
				}

				&[data-digit="2"] {
					:not(.top.left, .bottom.right) {
						--act: 1;
					}
				}

				&[data-digit="3"] {
					:not(.left) {
						--act: 1;
					}
				}

				&[data-digit="4"] {
					:not(.end, .bottom.left) {
						--act: 1;
					}
				}

				&[data-digit="5"] {
					:not(.top.right, .bottom.left) {
						--act: 1;
					}
				}

				&[data-digit="6"] {
					:not(.top.right) {
						--act: 1;
					}
				}

				&[data-digit="7"] {
					.top, .right {
						--act: 1;
					}
				}

				&[data-digit="8"] {
					> * {
						--act: 1;
					}
				}

				&[data-digit="9"] {
					:not(.bottom.left) {
						--act: 1;
					}
				}
			}
		}
	}
	
	.colon-group {
		transform-style: preserve-3d;
		
		.colon {
			span {
				display: flex;
				height: 16rem;
				flex-direction: column;
				justify-content: space-evenly;
				width: 4rem;
				align-items: center;
				filter: drop-shadow(0px 0px 4px currentColor) drop-shadow(0px 0px 10px currentColor);

				&::before, &::after {
					content: '';
					display: block;
					width: 2rem;
					aspect-ratio: 1/1;
					background-color: white;
					border-radius: 2rem;
				}
			}
		}
	}
	
	.shadow {
		top: 0;
		position: absolute;
		transform-origin: bottom center;
		transform: translateY(1rem) translateZ(2rem) rotateX(-90.1deg); // 90deg won't be visible on safari
		
		.digit {
			span {
				opacity: var(--act);
			}
		}

		&.shadow1 {
			opacity: 0.5;
			filter: drop-shadow(0px 0px 4px currentColor) 
				drop-shadow(0px 0px 10px currentColor)
				blur(4rem);
			
			> span, .digit {
				mask-image: linear-gradient(to bottom, white, rgba(0,0,0,0.5));
			}
		}

		&.shadow2 {
			opacity: 0.4;
			filter: drop-shadow(0px 0px 4px currentColor) 
				drop-shadow(0px 0px 10px currentColor)
				blur(4px);
			
			> span, .digit {
				opacity: var(--act);
				mask-image: linear-gradient(to top, black, rgba(0,0,0,0.1) 60%, rgba(0,0,0,0));
			}
		}
	}
}

@keyframes camera-rotate {
	0% {
		transform: rotateY(-10deg);
	}
	
	50% {
		transform: rotateY(10deg);
	}
	
	100% {
		transform: rotateY(-10deg);
	}
}

@keyframes camera-pan {
	0% {
		transform: translate(0rem, 0rem);
	}
	
	20% {
		transform: translate(1rem, 2rem);
	}
	
	40% {
		transform: translate(-2rem, 2.5rem);
	}
	
	50% {
		transform: translate(-1.5rem, 1.5rem);
	}
	
	70% {
		transform: translate(-0.5rem, -0.5rem);
	}
	
	90% {
		transform: translate(1.5rem, -1rem);
	}
	
	100% {
		transform: translate(0rem, 0rem);
	}
}

@keyframes hue-rotate {
	0% {
		color: hsl(0deg, var(--s), var(--l));
	}

	8.33% {
		color: hsl(30deg, var(--s), var(--l));
	}

	16.67% {
		color: hsl(60deg, var(--s), var(--l));
	}

	25% {
		color: hsl(90deg, var(--s), var(--l));
	}

	33.33% {
		color: hsl(120deg, var(--s), var(--l));
	}

	41.67% {
		color: hsl(150deg, var(--s), var(--l));
	}

	50% {
		color: hsl(180deg, var(--s), var(--l));
	}

	58.33% {
		color: hsl(210deg, var(--s), var(--l));
	}

	66.67% {
		color: hsl(240deg, var(--s), var(--l));
	}

	75% {
		color: hsl(270deg, var(--s), var(--l));
	}

	83.33% {
		color: hsl(300deg, var(--s), var(--l));
	}

	91.67% {
		color: hsl(330deg, var(--s), var(--l));
	}

	100% {
		color: hsl(360deg, var(--s), var(--l));
	}
}

.safari {
	.digit span {
		// 3d transform with opacity animation breaks filters
		transition: none !important;

		&::before {
			content: '';
			position: absolute;
			display: block;
			// prevent the bounding box to be cut off during content change
			width: 400%;
			height: 400%;
			top: 0;
			left: 0;
			transform: translate(-50%, -50%);
		}
	}
}
!

JS 

              
                const bars = [
	['end', 'top'],
	['side', 'top', 'left'],
	['side', 'top', 'right'],
	['middle'],
	['side', 'bottom', 'left'],
	['side', 'bottom', 'right'],
	['end', 'bottom']
];

const $main = document.querySelector('main');

const addDigits = number => {
	const initGroup = (number, padding = 2) => {
		const $group = document.createElement('div');
		$group.classList.add('group');

		const digits = [...`${number}`.padStart(padding, 0)].map(digit => {
			const $digit = document.createElement('figure');
			$digit.classList.add('digit');
			$digit.setAttribute('data-digit', digit);
			bars.forEach(classes => {
				const $span = document.createElement('span');
				$span.classList.add(...classes);
				$digit.append($span);
			});
			return $digit;
		});

		$group.append(...digits);

		return {
			element: $group,
			set number(val) {
				number = val;
				[...`${number}`.padStart(padding, 0).substring(`${number}`.length - 2)].forEach((digit, i) => {
					digits[i].setAttribute('data-digit', digit);
				});
			},

			get number() {
				return number;
			}
		}
	}
	
	const $digits = document.createElement('div');
	$digits.classList.add('digits');
	const group = initGroup(number);
	const groupShadow1 = initGroup(number);
	const groupShadow2 = initGroup(number);
	groupShadow1.element.classList.add('shadow');
	groupShadow1.element.classList.add('shadow1');
	groupShadow2.element.classList.add('shadow');
	groupShadow2.element.classList.add('shadow2');
	$digits.append(group.element);
	$digits.append(groupShadow1.element);
	$digits.append(groupShadow2.element);
	$main.append($digits);
	
	return {
		set number(val) {
			number = val;
			group.number = val;
			groupShadow1.number = val;
			groupShadow2.number = val;
		},
		get number() {
			return number;
		}
	}
}

const addColon = () => {
	const $colonGroup = document.createElement('div');
	$colonGroup.classList.add('colon-group');
	const $colon = document.createElement('figure');
	$colon.append(document.createElement('span'));
	const $colonShadow1 = document.createElement('figure');
	$colonShadow1.append(document.createElement('span'));
	const $colonShadow2 = document.createElement('figure');
	$colonShadow2.append(document.createElement('span'));
	$colon.classList.add('colon');
	$colonShadow1.classList.add('colon', 'shadow', 'shadow1');
	$colonShadow2.classList.add('colon', 'shadow', 'shadow2');
	$colonGroup.append($colon);
	$colonGroup.append($colonShadow1);
	$colonGroup.append($colonShadow2);
	$main.append($colonGroup);
}

const init = () => {
	let now = new Date();
	let hours = now.getHours();
	let minutes = now.getMinutes();
	let seconds = now.getSeconds();
	
	const numberHour = addDigits(hours);
	addColon();
	const numberMinute = addDigits(minutes);
	addColon();
	const numberSecond = addDigits(seconds);
	
	const update = () => {
		now = new Date();
		let newSeconds = now.getSeconds();
		if (seconds !== newSeconds) {
			hours = now.getHours();
			minutes = now.getMinutes();
			seconds = newSeconds;
			numberHour.number = hours;
			numberMinute.number = minutes;
			numberSecond.number = seconds;
		}
		
		requestAnimationFrame(update);
	}
	update();
}

if (/^(?:(?!chrome|android)[\s\S])*(?:safari|iPad|iPhone|iPod)/i.test(navigator.userAgent)) {
	document.body.classList.add('safari');
}

init();
!
999px

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