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HTML

              
                
<div class="cassette" style="--leftSpoolWidth:0.97">
	<pre><strong>ArtLung Mix</strong> (2024)
    by Joe Crawford</pre>
</div>

              
            
!

CSS

              
                html {
	height: 100%;
}
body {
	height: 100%;
	background-image: linear-gradient(lightblue 98vh,blue);
	display: flex;
	margin: 10px;
	gap: 10px;
	flex-wrap: wrap;
	justify-content: center;
	align-content: center;
	overflow: hidden;
}
:root {
  --angleAfter: 10deg;
	--angleBefore: 30deg;
}
.cassette {
	width: 450px;
	min-width: 450px;
	aspect-ratio: 20 / 13;
	--bgColor: transparent;
	--cassetteColor: #191919;
	--accentColor: #ccc;
	--darkAccentColor: #454545;
	--leftSpoolWidth: 0.98;
	--rightSpoolWidth: calc(1.0 - var(--leftSpoolWidth));
	position: relative;
	background-color: var(--bgColor);
	background-repeat: no-repeat;
	background-position: 
		50% 176px,
		left 50% top 95px,
		left 50% top 235px,
		5px 5px,
		right 5px top 5px,
		right 5px bottom 5px,
		left 5px bottom 5px,

		bottom 4px left 50%,
		bottom 4px left 50%,
	  bottom 4px right 50%,
		
		/* corners */
		5px 5px,
		right 5px top 5px,
		right 5px bottom 5px,
		left 5px bottom 5px,
		/* corners */
		0px 183px,
		right 0px top 183px,
		right 0px bottom 26px,
		left 0px bottom 26px,
    /* top blocks */		
		left 15px top 5px,
		left 5px top 18px,
		
		/* holes */
		left 5px top 86px,
		right 5px top 86px,
		left 0 top 190px,
		left 5px top 38px,
		right 5px top 38px,
		/* smaller holes */
		left 10px bottom 5px,
		left 160px bottom 7px,
		right 10px bottom 5px,
		right 160px bottom 7px,

		left 50% bottom 3px,
		left 50% bottom 5px,
		left 50% bottom 102px,

		left 10px bottom 5px,
		left 160px bottom 7px,
		right 10px bottom 5px,
		right 160px bottom 7px,
		
		left 50% top 86px,
		left 50% top 86px,
		
		left 25px top 33px,
		right 25px top 33px,
		left 25px top 81px,
		right 25px top 81px,
		
		left 50% top 38px,
		
		left -33px top -14px,
		right -33px top -14px,
		left 50% top 95px
		;
	background-size: 
		400px 37px,
		110px 75px,
		20px 20px,
		20px 20px,
		20px 20px,
		20px 20px,
		20px 20px,

		272px 70px,
		316px 70px,
		316px 70px,
		
		20px 20px,
		20px 20px,
		20px 20px,
		20px 20px,
		20px 20px,
		20px 20px,
		20px 20px,
		20px 20px,
		
		420px 20px,
		440px 20px,
		
		160px 100px,
		160px 100px,
		450px 72px,
		25px 240px,
		25px 240px,
		
		150px 30px,
		30px 30px,
		150px 30px,
		30px 30px,

		316px 6px,
		80px 30px,
		390px 4px,

		150px 30px,
		30px 30px,
		150px 30px,
		30px 30px,
		120px 100px,
		120px 100px,
		
		10px 10px,
		10px 10px,
		10px 10px,
		10px 10px,
		
		400px 48px,
		300px 300px,
		300px 300px,
		110px 75px
		;
	background-image: 
		repeating-linear-gradient(
			var(--darkAccentColor) 0 1px,
			var(--cassetteColor) 1px 2px
		),
		conic-gradient(from 34deg at 20px 65px,transparent,rgba(255,255,255,0.6),rgba(255,255,255,0.1),transparent),
		radial-gradient(var(--darkAccentColor),var(--cassetteColor) 10px,#0000 0),
		radial-gradient(var(--darkAccentColor),var(--cassetteColor) 10px,#0000 0),
		radial-gradient(var(--darkAccentColor),var(--cassetteColor) 10px,#0000 0),
		radial-gradient(var(--darkAccentColor),var(--cassetteColor) 10px,#0000 0),
		radial-gradient(var(--darkAccentColor),var(--cassetteColor) 10px,#0000 0),
		linear-gradient(var(--darkAccentColor),transparent 3px),
		linear-gradient(75deg,transparent 300px,var(--darkAccentColor) 303px,transparent 305px),
		linear-gradient(-75deg,transparent 300px,var(--darkAccentColor) 303px,transparent 305px),
		
		radial-gradient(circle,var(--cassetteColor) 10px, #0000 0),
		radial-gradient(circle,var(--cassetteColor) 10px, #0000 0),
		radial-gradient(circle,var(--cassetteColor) 10px, #0000 0),
		radial-gradient(circle,var(--cassetteColor) 10px, #0000 0),
		radial-gradient(circle,var(--cassetteColor) 10px, #0000 0),
		radial-gradient(circle,var(--cassetteColor) 10px, #0000 0),
		radial-gradient(circle,var(--cassetteColor) 10px, #0000 0),
		radial-gradient(circle,var(--cassetteColor) 10px, #0000 0),
		linear-gradient(var(--cassetteColor),var(--cassetteColor)),
		linear-gradient(var(--cassetteColor),var(--cassetteColor)),
		radial-gradient(circle at 70%,transparent 24px,var(--cassetteColor) 0),
		radial-gradient(circle at 30%,transparent 24px,var(--cassetteColor) 0),
		linear-gradient(var(--cassetteColor),var(--cassetteColor)),
		linear-gradient(var(--cassetteColor),var(--cassetteColor)),
		linear-gradient(var(--cassetteColor),var(--cassetteColor)),

		radial-gradient(circle at 85% 18px,transparent 8px,var(--cassetteColor) 0),
		radial-gradient(circle,transparent 8px,var(--cassetteColor) 0),
		radial-gradient(circle at 15% 18px,transparent 8px,var(--cassetteColor) 0),
		radial-gradient(circle,transparent 8px,var(--cassetteColor) 0),

		linear-gradient(var(--cassetteColor),var(--cassetteColor)),
		linear-gradient(var(--cassetteColor),var(--cassetteColor)),
		linear-gradient(var(--cassetteColor),var(--cassetteColor)),
		
		radial-gradient(circle at 87% 12px,transparent 8px,var(--darkAccentColor) 0),
		radial-gradient(circle at 60% 30%,transparent 8px,var(--darkAccentColor) 0),
		radial-gradient(circle at 13% 12px,transparent 8px,var(--darkAccentColor) 0),
		radial-gradient(circle at 40% 30%,transparent 8px,var(--darkAccentColor) 0),
		
		linear-gradient(var(--cassetteColor) 10px,transparent 10px 84px,var(--cassetteColor) 84px),
		linear-gradient(90deg,var(--cassetteColor) 5px,transparent 5px 115px,var(--cassetteColor) 0),
		
		radial-gradient(circle at 100% 100%, transparent 5px, var(--cassetteColor) 0),
		radial-gradient(circle at 0% 100%, transparent 5px, var(--cassetteColor) 0),
		radial-gradient(circle at 100% 0%, transparent 5px, var(--cassetteColor) 0),
		radial-gradient(circle at 0% 0%, transparent 5px, var(--cassetteColor) 0),
		/* label */
		linear-gradient(#888 6px,#efefef 6px 23px,#666 23px 24px, #efefef 24px 42px,#888 0),
		radial-gradient(circle,transparent 20px,
			#eee 20px 56px,#3e2d06 56px calc(56px + 55px * var(--leftSpoolWidth)), transparent 0),
		radial-gradient(circle,transparent 20px,
			#eee 20px 56px,#3e2d06 56px calc(56px + 55px * var(--rightSpoolWidth)), transparent 0),
		linear-gradient(var(--darkAccentColor) 4px,transparent 4px 70px,var(--darkAccentColor) 70px,#000)
		;
}
.cassette::after,.cassette::before {
	content: '';
	display: block;
  width: 48px;
  height: 48px;
	background-position: left 0 top 50%,left 50% top 0;
	background-size: 38px 8px,8px 38px;
	background-repeat: repeat-x,repeat-y;
	background-image: 
		linear-gradient(90deg,#eee 10px, transparent 0),
		linear-gradient(#eee 10px, transparent 0)
		;
	position: absolute;
}
.cassette::after {
	transform: rotate(var(--angleAfter));
	animation: rotateAfter 3.5s linear infinite;
	top: 112px;
	left: 93px;
}
.cassette[data-autoreverse="true"]::after {
	animation: rotateAfterReverse 3.5s linear infinite;
}
.cassette::before {
	transform: rotate(var(--angleBefore));
	animation: rotateBefore 3.5s linear infinite;
	top: 112px;
	right: 93px;
}
.cassette[data-autoreverse="true"]::before {
	animation: rotateBeforeReverse 3.5s linear infinite;
}

.cassette pre {
	font-family: 'Courier New', 'Courier', monospace;
	margin: 0;
	background: transparent;
	position: absolute;
	line-height: 1.3;
	color: #222;
	top: 42px;
	left: 32px;
	width: 386px;
	height: 42px;
	overflow: hidden;
}

@keyframes rotateAfterReverse {
	0% {
		transform: rotate(0deg);
	}
	100% {
		transform: rotate(359deg);
	}
}
@keyframes rotateBeforeReverse {
	0% {
		transform: rotate(10deg);
	}
	100% {
		transform: rotate(369deg);
	}
}
@keyframes rotateAfter {
	0% {
		transform: rotate(359deg);
	}
	100% {
		transform: rotate(0deg);
	}
}
@keyframes rotateBefore {
	0% {
		transform: rotate(369deg);
	}
	100% {
		transform: rotate(10deg);
	}
}

              
            
!

JS

              
                /* we count down from 1 to 0, then autoreverse 0 to 1 */
let Cassette = {
	elem: null,
	increment: 0.009,
	ms: 750,
	maxValue: 1.0,
	minValue: 0.0,
	varName: '--leftSpoolWidth',
	currentValue: 0.5,
	autoReverse: false,
	setCurrentValue: function(v) {
		this._currentValue = parseFloat(v);
		return this;
	},
	getNewValue: function() {
		let newValue;
		if (this.autoReverse) {
		  newValue = this._currentValue + this.increment;
		} else {
		  newValue = this._currentValue - this.increment;
		}
		if (this.autoReverse) {
			if (newValue > this.maxValue) {
				this.autoReverse = false;
				this.elem.setAttribute('data-autoreverse', false);
			}
		} else {
			if (newValue < this.minValue) {
				this.autoReverse = true;
				this.elem.setAttribute('data-autoreverse', true);
			}
		}
		return [this.varName, newValue].join(':');
	}
};
Cassette.elem = document.querySelector('.cassette');

setInterval(function() {
	let currentStyle = Cassette.elem.getAttribute('style');
	Cassette.elem.setAttribute('style', Cassette
										.setCurrentValue(currentStyle.split(':')[1])
										.getNewValue());
}, Cassette.ms);
              
            
!
999px

Console