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Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

            
              - var data = [
- 	'10 lateral antiprism faces (all triangles) pointing up', 
- 	'10 lateral antiprism faces (all triangles) pointing down', 
- 	'10 lateral rotunda faces (alternating triangles and pentagons) pointing up', 
- 	'5 lateral rotunda faces (all triangles) pointing down'
- ];
- var m = data.length;
- var n = 5;
- var max = 45, val = -max/3;

body.paused(style=`--max: ${max}; --val: ${val}` data-step='0')
	nav
		button#prev(data-dir='-1') Previous
		p#inf
			- for(var i = 0; i <m; i++){
				span.step(data-step=i class=i ? null : 'curr') #{data[i]}
			- }
		button#next(data-dir='1') Next

	section.scene
		.rot
			.s3d
				- for(var j = 0; j < 4*n; j++)
					.s2d.mid.lat.s3gon(class=j < 2*n ? 'dir' : 'rev')
				- for(var j = 0; j < n; j++)
					.s2d.cup.lat.s3gon.dir
					.s2d.cup.lat.s5gon.dir
				- for(var j = 0; j < n; j++)
					.s2d.cup.lat.s3gon.rev
				.s2d.mid.base(class=`s${2*n}gon`)
				.s2d.cup.base(class=`s${n}gon`)

	form
		input#fx(type='range' min=-max max=max value=val)
		label(for='fx')
			span.token--func rotatex
			span.token--punc (
			span.token--arg.token--ang
				span.token--num
				span.token--unit deg
			span.token--punc )
		input#play(type='checkbox')
		label(for='play') Playing
            
          
!
            
              $bg: #262626;
$fg: #e7e7e7;
$hl: #f44336;
$fc: #8bc34a;
$gc: #4caf50;

$gap: .5em;
$num: 2.5em;

$thumb-d: 1.25em;
$track-w: 9em;
$track-h: .25em;
$input-h: $thumb-d + 2*$track-h;

$check-d: 1.522em;
$lc: #8bc34a;
$dc: #f44336;

// GEOMETRY
$l: 15vmin; // edge length
$n: 5; // base face type (3 = triangular)
// lateral face heights
$h3gon: poly-h($l, 3);
$h5gon: poly-h($l, 5);
// pentagonal diagonal
$d5gon: 2*$l*sin(.5*vx-ang(5));
// base planes
$ba-b0: bc-ang($n); // top base central angle
$ri-b0: in-rad($l, $ba-b0); // top base inradius
$rc-b0: cc-rad($l, $ba-b0); // top base circumradius
$ba-b1: bc-ang(2*$n); // bottom base central angle
$ri-b1: in-rad($l, $ba-b1); // bottom base inradius
$rc-b1: cc-rad($l, $ba-b1); // bottom base circumradius
// mid plane
$rc-m: cc-rad($d5gon, $ba-b0);
// lateral face angles with the vertical
$ax3-mid: to-deg(asin(($rc-b1 - $ri-b1)/$h3gon));
$ax3-cup-dir: to-deg(asin(($ri-b1 - $rc-m)/$h3gon));
$ax3-cup-rev: to-deg(asin(($ri-b0 - $rc-m)/$h3gon));
$ax5: to-deg(asin(($ri-b1 - $rc-b0)/$h5gon));
// heights
$h-mid: cath1($h3gon, $rc-b1 - $ri-b1);
$h-cup: cath1($h5gon, $ri-b1 - $rc-b0);
$h: $h-mid + $h-cup;

// VISUAL
$clst: #ff8a00 #da1b60 #9c27b0;
$flst: 3 $n 2*$n;
$llen: length($flst);

$t: 15s;

@mixin track() {
	width: 100%; height: $track-h;
	border-radius: $track-h;
	background-color: $fg;
	background: radial-gradient(circle at var(--pos) 50%, transparent .5*$thumb-d, $fg 0)
}

@mixin thumb() {
	width: $thumb-d; height: $thumb-d;
	border-radius: 50%;
	transform: scale(calc(1 - var(--nothl)*.39));
	background: $hl;
	filter: grayScale(var(--nothl)) brightness(calc(1 + 1.5*var(--nothl)));
	transition: .3s
}

@mixin poly($n, $ba) {
	--rc: #{cc-rad($l, $ba)};
	--ri: #{in-rad($l, $ba)};
	--poly: #{polygon(get-poly-points($n))};
	
	&:before { --poly: #{polygon(get-poly-points($n, $bw: 2px))} }
}

* { margin: 0; font: inherit }

body {
	--ax: calc(var(--val)*1deg);
	display: flex;
	align-items: center;
	flex-direction: column-reverse;
	overflow: hidden;
	position: relative;
	min-height: 100vh;
	background: $bg;
	color: $fg;
}

nav, form {
	font: 1.25em consolas, monaco, ubuntu mono, monospace
}

nav {
	box-sizing: border-box;
	display: grid;
	grid-template-columns: max-content 1fr max-content;
	grid-gap: $gap;
	place-items: center;
	padding: $gap;
	width: 100%;
}

[id='inf'] { display: contents }

.step {
	position: relative;
	border: solid .5*$gap transparent;
	border-radius: 5px;
	background: #03a9f4;
	color: $bg;
	
	&:not(.curr) { display: none }
}

button {
	--hl: 0;
	--nothl: calc(1 - var(--hl));
	--notk: calc(1 - var(--k));
	--sgnk: calc(1 - 2*var(--k));
	overflow: hidden;
	position: relative;
	outline: solid 0 RGBA(0, 0, 0, calc(var(--hl)*var(--nothl)));
	border: solid 3px RGBA(red($fc), green($fc), blue($fc), var(--i));
	padding: $gap;
	width: 2em;
	border-radius: 5px;
	background: $gc;
	color: $bg;
	text-indent: -100vw;
	filter: contrast(9) Grayscale(var(--nothl));
	cursor: pointer;
	
	&:before, &:after {
		--noti: calc(1 - var(--i));
		--sgni: calc(1 - 2*var(--i));
		position: absolute;
		top: calc(50% - #{.5*$track-h}); left: 15%;
		width: 70%; height: $track-h;
		border-radius: .5*$track-h;
		transform-origin: calc(var(--k)*100%) 50%;
		transform: rotate(calc(var(--sgnk)*var(--sgni)*30deg));
		background: $bg;
		filter: blur(2px);
		content: ''
	}
	
	&:before { --i: 0 }
	&:after { --i: 1 }
	
	&:hover, &:focus { --hl: 1 }
}

[id='prev'] { --k: 0 }
[id='next'] { --k: 1 }

.scene {
	flex: 1;
	perspective: 25em
}

div {
	position: absolute;
	transform-style: preserve-3d
}

.rot {
	top: 50%; left: 50%;
	transform: rotatex(var(--ax))
}

.s3d {
	
	transform: rotatey(0turn);
	animation: rot $t linear infinite;
	
	.paused & { animation-play-state: paused }
}

@keyframes rot { 0% { transform: rotatey(1turn) } }

.s2d {
	--noti: calc(1 - var(--i));
	--sgni: calc(2*var(--i) - 1);
	--notk: calc(1 - var(--k));
	--notp: calc(1 - var(--p));
	--nor: calc((1 - var(--k))*(1 - var(--i)));
	--xor: calc((var(--k) - var(--i))*(var(--k) - var(--i)));
	--and: calc(var(--i)*var(--k));
	--nand: calc(1 - var(--and));
	margin: calc(-1*var(--rc));
	padding: var(--rc);
	-webkit-clip-path: var(--poly);
					clip-path: var(--poly);
	
	&:before, &:after {
		position: absolute;
		top: 0; right: 0; bottom: 0; left: 0;
		content: ''
	}
	
	&:before {
		background: currentcolor;
		-webkit-clip-path: var(--poly);
						clip-path: var(--poly);
	}
}

.mid { --i: 0 }
.cup { --i: 1 }

.lat {
	--vis: 0;
	--j: calc((1 + var(--and))*var(--idx) + .5*var(--nor));
	--ay: calc(var(--j)*#{$ba-b1});
	--y: calc(var(--nor)*#{.5*$h} + 
						var(--xor)*#{.5*$h - $h-mid} - 
						var(--and)*#{.5*$h});
	--z: calc(var(--and)*#{$ri-b0} + var(--nand)*#{$ri-b1});
	--ax: calc(var(--notp)*(var(--noti)*#{-$ax3-mid} + 
													var(--i)*(var(--notk)*#{$ax3-cup-dir} + 
																		var(--k)*#{$ax3-cup-rev})) +
						 var(--p)*#{$ax5});
	margin-top: calc(-1*(var(--rc) + var(--ri)));
	transform-origin: 50% calc(50% + var(--ri));
	transform: 
		rotatey(var(--ay)) 
		translate3d(0, var(--y), var(--z)) 
		rotate(calc(var(--k)*.5turn)) 
		rotatex(var(--ax));
	
	@for $i from 0 to 2*$n {
		&:nth-child(#{2*$n}n + #{$i + 1}) { --idx: #{$i} }
	}

	&:after {
		display: grid;
		place-content: center;
		transform: rotate(calc(var(--k)*-.5turn));
		opacity: var(--vis);
		color: #000;
		counter-reset: idx var(--idx);
		content: counter(idx)
	}
	
	[data-step='0'] &:nth-child(-n + #{2*$n}), 
	[data-step='1'] &:nth-child(n + #{2*$n + 1}):nth-child(-n + #{4*$n}), 
	[data-step='2'] &:nth-child(n + #{4*$n + 1}):nth-child(-n + #{6*$n}), 
	[data-step='3'] &:nth-child(n + #{6*$n + 1}):nth-child(-n + #{8*$n}) { --vis: 1 }
}

.base {
	--vis: .65;
	transform: 
		rotatex(calc(var(--sgni)*90deg)) 
		translatez(.5*$h)
		rotate(calc(var(--noti)*#{.5*$ba-b1}));
	opacity: .5
}

@for $i from 0 to $llen {
	$m: nth($flst, $i + 1);
	
	.s#{$m}gon {
		@if $m < 2*$n { --p: #{$i} }
		@include poly($m, bc-ang($m));
		$c: nth($clst, $i + 1);
		background: RGBA(red($c), green($c), blue($c), var(--vis))
	}
}

.dir { --k: 0 }
.rev { --k: 1 }

form {
	--pos: calc(.5*(#{$thumb-d} + (var(--val) + var(--max))/var(--max)*(100% - #{$thumb-d})));
	padding: .5em;
	width: $track-w; height: 2*$input-h;
	background: rgba(#000, .5);
	color: $fg;
	font: 1em consolas, monaco, ubuntu mono, monospace
}

input, label {
	--hl: 0;
	--nothl: calc(1 - var(--hl))
}

input:focus, input:focus + label, 
[type='range']:hover, [type='checkbox'] + label:hover { --hl: 1 }

[type='range'] {
	&, &::-webkit-slider-thumb, 
	&::-webkit-slider-runnable-track {
		-webkit-appearance: none
	}
	
	display: block;
	width: 100%; height: $input-h;
	background: none;
	cursor: pointer;
	
	&::-webkit-slider-runnable-track {
		@include track
	}
	
	&::-moz-range-track {
		@include track
	}
	
	&::-webkit-slider-thumb {
		margin-top: .5*($track-h - $thumb-d);
		@include thumb
	}
	
	&::-moz-slider-thumb {
		@include thumb
	}
	
	+ label {
		display: block;
		text-align: center;
		
	}
	
	&:focus { outline: solid 0 transparent }
}

.token {
	&--num {
		counter-reset: fx var(--val);
		
		&:after { content: counter(fx) }
	}
}

[type='checkbox'] {
	left: -100vmax;
	position: absolute;
	
	+ label {
		--check: 0;
		--notcheck: calc(1 - var(--check));
		overflow: hidden;
		position: absolute;
		top: $gap; left: $gap;
		border: solid $gap transparent;
		width: $check-d; height: $check-d;
		border-radius: 5px;
		background: inherit;
		text-indent: -100vw;
		cursor: pointer;
		
		&:before, &:after {
			$hue0: hue($lc);
			$sat0: saturation($lc);
			$lum0: lightness($lc);
			$hue1: hue($dc);
			$sat1: saturation($dc);
			$lum1: lightness($dc);
			
			--q: 0;
			--notq: calc(1 - var(--q));
			position: absolute;
			top: 0; right: 0; bottom: 0; left: 0;
			transform-origin: 100% 50%;
			transform: scalex(calc(1 - var(--notcheck)*.2));
			background: 
			hsl(calc(var(--notcheck)*#{$hue0} + var(--check)*#{$hue1}), 
					calc(var(--notcheck)*#{$sat0} + var(--check)*#{$sat1}), 
					calc(var(--notcheck)*#{$lum0} + var(--check)*#{$lum1}));
			--points: calc(var(--q)*var(--check)*65%) 0, 
								calc(var(--q)*var(--check)*65%) 100%,  
								calc(100% - var(--notq)*var(--check)*65%) calc(100% - var(--notcheck)*50%), 
								calc(100% - var(--notq)*var(--check)*65%) calc(var(--notcheck)*50%);
			-webkit-clip-path: polygon(var(--points));
							clip-path: polygon(var(--points));
			filter: grayScale(var(--nothl));
			transition: .3s;
			content: ''
		}
		
		&:after { --q: 1 }
	}
	
	&:checked + label { --check: 1 }
}
            
          
!
            
              const _BODY = document.body, 
			_STEP = [...document.querySelectorAll('.step')], 
			_PLAY = document.getElementById('play'), 
			_FVAL = document.getElementById('fx'), 
			N = _STEP.length;

let curr = +_BODY.dataset.step;

addEventListener('click', e => {
	let _tg = e.target;
	
	if(_tg.tagName.toLowerCase() === 'button') {
		let dir = +_tg.dataset.dir;
		
		_STEP[curr].classList.remove('curr');
		curr = (curr + dir + N)%N;
		_STEP[curr].classList.add('curr');
		_BODY.dataset.step = curr
	}
}, false);

_PLAY.addEventListener('change', e => {
	_BODY.classList.toggle('paused')
}, false);

_FVAL.addEventListener('input', e => {
	_BODY.style.setProperty('--val', 1*_FVAL.value)
}, false);
            
          
!
999px
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