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HTML 

              
                input#start(type="checkbox", name="start")
input#playPause(type="checkbox", name="playPause")

p.CTA
  span All pause and no PLAY makes
  span &nbsp;Jack-o-Lantern a dull pen.
p

- var ngon = 24

.scene
  .pivot
    - for (var s = 0; s < ngon; ++s) {
    .slice
      - for (var f = 0; f < ngon/2; ++f) {
      .facet
        if s == 6 || s == 7
          if f == 3 || f == 8
            .corner.outerCorner
          else if f == 4 || f == 7
            .corner.innerCorner
        else if s == 9 || s == 12
          if f > 0 && f < ngon/2 - 1
            .lefTooth
            .righTooth
        else if s == 20
          .crookeTooth
            .left
            .right
            .top
            .behind
      - }
    - }
    
    .partition.vertical
    .partition.coverEyes
    .partition.loGums
    .partition.crooked
    .partition.coverPeepers
    .partition.lazyEye
      - for (var l = 0; l < ngon/2; ++l) {
      div
      - }
    .partition.lazyEye
      - for (var l = 0; l < ngon/2; ++l) {
      div
      - }
    .lilPump
      .segments
        - for (var seg = 0; seg < ngon/2; ++seg) {
        div
        - }
      .holes
        - for (var hol = 0; hol < ngon/2; ++hol) {
        div
        - }
label.startBtn(for="start")
label.playBtn(for="playPause")
  div
  div
!

CSS 

              
                @use "sass:math";

$ngon: 24;
$angle: 360deg/$ngon;

$sliceW: 100em*math.sin($angle/2);

body {
  margin: 0;
  background: #000;
  font-size: .66vh;
  display: grid;
  height: 100vh;
  color: #fff;
  
}

.CTA {
  font-family: courier;
  font-weight: bold;
  font-size: 2vw;
  line-height: 2em;
  color: #f80;
  margin: 1em;
  justify-self: center;
  text-shadow: .1em .1em .2em #0b0;
}

span {
  display: inline-block;
  white-space: nowrap;
  overflow: hidden;
  justify-self: center;
}

span:nth-child(1) {
  animation: tippaTappa 8s steps(27,end) infinite;
}

span:nth-child(2) {
  animation: clicketyClack 8s steps(27,end) infinite;
}

@keyframes tippaTappa {
  0% {
    width: 0ch;
  }
  25% {
    width: 27ch;
  }
}

@keyframes clicketyClack {
  0%, 25% {
    width: 0ch;
  }
  50% {
    width: 27ch;
  }
}

.scene {
  width: 100em;
  aspect-ratio: 1;
  position: absolute;
  display: grid;
  place-self: center;
  filter: contrast(1.1);
}

.scene, .pivot, .slice, .facet, .facet > div, .partition {
  transform-style: preserve-3d;
}

.pivot {
  position: absolute;
  inset: 0;
  display: grid;
  justify-items: center;
  animation: spin 12s linear infinite;
  --offset: #{$angle};
}

/* PARTITIONS: dividers rotated around the y axis that either separate/obscure different sections or serve as rims for the carved openings */

.partition {
  content: '';
  position: absolute;
  inset: 0%;
  margin: 1%; /* just so that the partition doesn't poke through the sphere */
  border-radius: 50%;
}

.vertical {
  background: #000;
  rotate: y calc(2*var(--offset));
}

.coverEyes {
  background-image: linear-gradient(90deg, black 50%, transparent 50%); /* a half-circle covering only the evil's eyes */
  rotate: y calc(-2.5*var(--offset));
}

.loGums {
  background-image: linear-gradient(-20deg, green,orangered);
  mask-image: radial-gradient(transparent calc(#{math.sqrt(2)}*45%), black calc(#{math.sqrt(2)}*45%));
  -webkit-mask-image: radial-gradient(transparent calc(#{math.sqrt(2)}*45%), black calc(#{math.sqrt(2)}*45%));
  clip-path: inset(0 50% 0 0);
  rotate: y calc(3.5*var(--offset));
  margin: .5%; /* either that or a ngon clip-path - in which case border-radius would also be redundant */
  backface-visibility: hidden;
  animation: glow 12s linear infinite;
  animation-delay: -8s;
  }

.crooked {
  mask-image: conic-gradient(#000 45deg, #0000 45deg 60deg,#000 60deg 90deg,#0000 90deg 105deg, #000 105deg 135deg,#0000 135deg 150deg,#000 150deg 180deg, #0000 180deg);
  -webkit-mask-image: conic-gradient(#000 45deg, #0000 45deg 60deg,#000 60deg 90deg,#0000 90deg 105deg, #000 105deg 135deg,#0000 135deg 150deg,#000 150deg 180deg, #0000 180deg);
  rotate: y calc(21.5*var(--offset));
  margin: 0; /* either that or a ngon clip-path - in which case border-radius would also be redundant */
  backface-visibility: hidden;
  animation: glow 12s linear infinite;
  animation-delay: 1s;
  animation-play-state: paused;
}

.crooked::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: linear-gradient(orange,lime);
  mask-image: radial-gradient(transparent calc(#{math.sqrt(2)}*45%), black calc(#{math.sqrt(2)}*45%));
  -webkit-mask-image: radial-gradient(transparent calc(#{math.sqrt(2)}*45%), black calc(#{math.sqrt(2)}*45%));
  border-radius: 50%;
}

.coverPeepers {
  background-image: radial-gradient(circle, #0000 30%, #000 30% 65%, #0000 65%);
  mask-image: linear-gradient(90deg, black 49%, transparent 49%);
  -webkit-mask-image: linear-gradient(90deg, black 49%, transparent 49%); /* a half-circle covering only the evil's eyes */
  rotate: y calc(-13.5*var(--offset));
}

.lazyEye {
  margin: 0; /* toggling off the standard partition margin, don't need it here */
  border-radius: 0;
  display: flex;
  align-items: center;
  transform: rotateY(calc(12.5*var(--offset))) rotate(calc(var(--dir)*30deg));
}

.lazyEye::before {
  content: '';
  position: absolute;
  width: 45em;
  aspect-ratio: 1;
  border-radius: 50%;
  animation: eyeRoll 1s linear infinite;
}

.lazyEye:nth-child(even) {
  --dir: 1;
}

.lazyEye:nth-child(odd) {
  --dir: -1;
}

.lazyEye:nth-child(even)::before {
  background-image: radial-gradient(at 66.6% 50%, #fff 2%, #0f0 2%, #000 5%);
  /* background-image: linear-gradient(blue 49%, pink 49% 51%, blue 51%); */
}

.lazyEye:nth-child(odd)::before {
  background-image: radial-gradient(at 33.3% 50%, #ff0 2%, #f80 2%, #000 5%);
  /* background-image: linear-gradient(blue 49%, lime 49% 51%, blue 51%); */
}

.lazyEye div {
  left: 2.8em;
  position: absolute;
  width: 7em;
  --lazyH: calc(2.2*#{$sliceW}*#{math.sin($angle)}); 
  height: calc(var(--lazyH) + 1px);
  transform: rotateX(calc(var(--lazyStep)*var(--offset)*2)) translateZ(calc(#{$sliceW}*-1.1*#{math.cos($angle)})); /* rotation is multiplied by two since the number of facets is half of the ngon */
  background-size: 100% calc(12*var(--lazyH));
  backface-visibility: hidden;
  transform-style: preserve-3d;
  animation: rollGlow 1s linear infinite;
}

.lazyEye:nth-child(even) div {
  background-image: linear-gradient(#4f4, #280 45% 55%, #280, #4f4 100%);
  /* background-image: linear-gradient(#0f0, #022, #100 15% 85%, #022, #0f0 100%); */
  /* background-image: linear-gradient(blue 49%, red 49% 51%, blue 51%); */
}

.lazyEye:nth-child(odd) div {
  background-image: linear-gradient(#f80 5%, #ff4, #f80 95%);
  /* background-image: linear-gradient(#010 35%, #840, #fb0, #840, #010 65%); */
  /* background-image: linear-gradient(blue 49%, yellow 49% 51%, blue 51%); */
}

@for $i from 1 through $ngon/2 {
  .lazyEye div:nth-child(#{$i}) {
  --lazyStep: #{$i - 1};
  }
}

.crookeTooth {
  position: absolute;
  width: inherit;
  aspect-ratio: 1;
  transform-origin: 100% 0;
  transform-style: preserve-3d;
  --thickness: 6em;
  animation: looseTeeth 1.5s ease-in-out alternate infinite, flatColor 12s linear infinite;
  animation-delay: calc(var(--looseStep)*-.7s), -10s;
}

@for $i from 1 through $ngon/2 {
  $crookDelta: (math.sin($angle*($i - 1)) - math.sin($angle*$i))/2;
  $crookTurn: math.asin($crookDelta);
  
  .facet:nth-child(#{$i}) .crookeTooth {
  right: calc(50%*#{(1+math.sin($angle*($i - 1)))});
    --turnTooth: calc(-1*#{$crookTurn});
    --looseStep: #{$i - 1};
  }
  
}

.crookeTooth, .crookeTooth div {
  backface-visibility: hidden;
}

.crookeTooth .behind {
  position: absolute;
  inset: 0;
  background: #000;
  transform: translateZ(calc(-1*var(--thickness))) rotateY(180deg);
}

.crookeTooth .left, .crookeTooth .right, .crookeTooth .top {
  position: absolute;
  width: 100%;
  height: var(--thickness);
  animation: glow 12s linear infinite;
  animation-delay: -1s;
}

.crookeTooth .left {
  background: darkgreen;
  bottom: 100%;
  transform-origin: 0 100%;
  rotate: x 90deg;
}

.crookeTooth .right {
  background: maroon;
  top: 100%;
  transform-origin: 0 0;
  rotate: x -90deg;
}

.crookeTooth .top {
  background-image: linear-gradient(orange,lime);
  top: 0;
  transform-origin: 0 0%;
  transform: rotate(90deg) rotateX(-90deg);
}

.slice {
  position: absolute;
  width: calc(#{$sliceW} + 1px);
  height: 100%;
  transform: rotateY(calc(var(--nthSlice)*-1*#{$angle}));
  display: grid;
}

@for $i from 1 through $ngon {
  .slice:nth-child(#{$i}) {
    --nthSlice: #{$i - 1};
  }
}

.slice:nth-of-type(2n+1) {
  --latter: 0;
}

.slice:nth-of-type(2n) {
  --latter: 1;
}

.facet {
  position: absolute;
  width: 100%;
  transform-origin: 50% 0;
  padding-block: 1px;
  backface-visibility: hidden;
}

.facet:empty, .facet:not(:empty)::before {
  background-image: linear-gradient(90deg,#050,#080400,#f60,#080400,#050);
  background-size: calc(.5*100em*#{math.sin($angle/2)}*#{$ngon}) 100%; /* .5 being the stretch factor */
  background-position-x: calc(.5*(var(--nth)*100em*#{math.sin($angle/2)} - 100em*#{math.sin($angle/2)}*var(--latter)));
  animation: lighting 12s linear infinite;
}

.facet:before {
  content: '';
  position: absolute;
  inset: 0;
}

.slice:nth-child(2) .facet::after, .slice:nth-child(3) .facet::after { /* might be redundant, since it's black on black but might come in handy if I adda background */
  content: '';
  position: absolute;
  inset: 0;
  background: #000;
  rotate: y 180deg;
  backface-visibility: hidden;
}

@for $i from 1 through $ngon/2 {
  $y1: 50em*(1 - math.cos($angle*($i - 1)));
  $y2: 50em*(1 - math.cos($angle*$i));
  $deltaY: $y2 - $y1;
  $z1: 50em*math.sin($angle*($i - 1));
  $z2: 50em*math.sin($angle*$i);
  $deltaZ: $z2 - $z1;
  $facetH: math.hypot($deltaY,$deltaZ);
  $facetAngle: math.atan($deltaZ/$deltaY);

  .facet:nth-child(#{$i}) {
      top: #{$y1};
      height: #{$facetH};
      transform: translateZ(#{$z1}) rotateX(#{$facetAngle});
    }
  
  .facet:nth-child(#{$i}), .gapSides > div > div:nth-child(#{$i}) {
    --nth: #{$i - 1};
  }

    .gapSides > div > div:nth-child(#{$i}) {
    --inclineX: calc(-1*var(--offset) * #{math.cos($angle/2)});
  }
  
  $TLtip: 50%*(1 - math.sin($angle*($i - 1)));
  $TRtip: 50%*(1 + math.sin($angle*($i - 1)));
  $BLtip: 50%*(1 - math.sin($angle*$i));
  $BRtip: 50%*(1 + math.sin($angle*$i));

  .facet:nth-child(#{$i}):empty, .facet:nth-child(#{$i}):not(:empty)::before, .slice:nth-child(2) .facet:nth-child(#{$i})::after, .slice:nth-child(3) .facet:nth-child(#{$i})::after {
    clip-path: polygon(#{$TLtip} 0, #{$TRtip} 0, #{$BRtip} 100%, #{$BLtip} 100%);
  }
  
  @if $i == 4 or $i == 8 {

    .slice:nth-child(7) .facet:nth-child(#{$i})::before {
      clip-path: polygon(#{$TLtip} 0, #{$TRtip} 0, #{$BRtip} 100%);
       /* the last one is left out; notice the 1-sin/1+sin strings in each coordinate */
    }
    
    .slice:nth-child(8) .facet:nth-child(#{$i})::before {
      clip-path: polygon(#{$TLtip} 0, #{$TRtip} 0, #{$BLtip} 100%);
      /* the third one is left out */
    }
  
  }
    
  @if $i == 5 or $i == 9 {

    .slice:nth-child(7) .facet:nth-child(#{$i})::before {
      clip-path: polygon(#{$TRtip} 0, #{$BRtip} 100%, #{$BLtip} 100%);
       /* the last one is left out; notice the 1-sin/1+sin strings in each coordinate */
    }
    
    .slice:nth-child(8) .facet:nth-child(#{$i})::before {
      clip-path: polygon(#{$TLtip} 0, #{$BRtip} 100%, #{$BLtip} 100%);
      /* the third one is left out */
    }

  }

  @if $i == 4 {
    $lCw: (math.sin($angle*($i - 1)) + math.sin($angle*$i))/2*$sliceW;
    $lCh: math.hypot($deltaY,$deltaZ); // #{$facetH};
    $hypoLC: math.hypot($lCw,$lCh);
    $angleLC: math.atan($lCw/$lCh);

    .outerCorner { /* this is the same for outer and inner eye corner */
      position: absolute;
      height: #{$hypoLC};
      --corner: #{math.sin($angle*($i - 1))};
      width: 5em;
      transform: rotate(calc(-1*#{$angleLC}*var(--tdir))) rotateY(-90deg);
    }
  }

  @if $i == 5 {
    $lCw: (math.sin($angle*($i - 1)) + math.sin($angle*$i))/2*$sliceW;
    $lCh: math.hypot($deltaY,$deltaZ); // #{$facetH};
    $hypoLC: math.hypot($lCw,$lCh);
    $angleLC: math.atan($lCw/$lCh);

    .innerCorner { /* this is the same for outer and inner eye corner */
      position: absolute;
      height: #{$hypoLC};
      --corner: #{math.sin($angle*($i - 1))};
      width: 5em;
      background: fuchsia;
      transform: rotate(calc(-1*#{$angleLC}*var(--tdir))) rotateY(-90deg);
    }
  }

  /* the scary one's teeth*/

  @if $i>1 and $i<($ngon/2) {

    .slice:nth-child(10) .facet:nth-child(#{$i})::before {
      clip-path: polygon(50%*(1 - math.sin($angle*($i - .5))) 50%, 50%*(1+math.sin($angle*($i - 1))) 0, 50%*(1+math.sin($angle*$i)) 100%);
    }
    
    .slice:nth-child(13) .facet:nth-child(#{$i})::before {
      clip-path: polygon(50%*(1 + math.sin($angle*($i - .5))) 50%, 50%*(1 - math.sin($angle*($i - 1))) 0, 50%*(1 - math.sin($angle*$i)) 100%);
    }
    
    :is(.slice:nth-child(10), .slice:nth-child(13)) .facet:nth-child(#{$i}) :is(.lefTooth,.righTooth) {
      $lTw: (math.sin($angle*($i - .5)) + math.sin($angle*$i))/2*$sliceW;
      $lTh: .5*$facetH;
      $hypoLT: math.hypot($lTw,$lTh);
      $angleLT: math.atan($lTw/$lTh);
       
      height: #{$hypoLT};
      transform: rotateY(-90deg) rotateX(calc(var(--tdir)*#{$angleLT}));
    }
    
    .slice:nth-child(10) .facet:nth-child(#{$i}) :is(.lefTooth, .righTooth) {
      right: 50%*(1 + math.sin($angle*($i - .5)));
    }
    
    .slice:nth-child(13) .facet:nth-child(#{$i}) :is(.lefTooth, .righTooth) {
      right: 50%*(1 - math.sin($angle*($i - .5)));
    }

  }

}

:is(.slice:nth-child(11),.slice:nth-child(12)) .facet:not(:first-child):not(:last-child), /* the evil's mouth */
:is(.slice:nth-child(22), .slice:nth-child(23), .slice:nth-child(24)) .facet,
.slice:nth-child(1), .slice:nth-child(2), .slice:nth-child(3), 
.facet:not(:nth-child(3n+4)) .crookeTooth { /* the goof's mouth*/
  display: none;
}

.lefTooth, .righTooth {
  position: absolute;
  width: 5em; /* the thickness of the pumpkin's skull, you can set it to anything within reason */
  height: 6em;
  filter: brightness(.2);
  animation: glow 12s linear infinite;
}

.slice:nth-child(10) .facet div { /* the cutout surfaces on the upper teeth */
  animation-delay: -6s;
}

.lefTooth {
  background: linear-gradient(#f50,#f90);
  bottom: 50%;
  transform-origin: bottom right;
}

.righTooth {
  background: linear-gradient(#bf0,#0a0);
  top: 50%;
  transform-origin: top right;
}

/* general styling and shared patterns for the outer corners of the evil one's eyes*/

.outerCorner, .innerCorner {
  right: calc(50%*(1 + var(--corner)*var(--anchorDir)));
  animation: glow 12s linear infinite;
}

.slice:nth-child(7) .facet div { /* the upper eyelid */
  animation-delay: -4.5s; /* .5s per slice, the difference from teeth is 3 slices, ergo 1.5s subtracted from 6s */
}

.slice:nth-child(8) .facet div { /* the upper eyelid */
  animation-delay: -7.5s; /* .5s per slice, the difference from teeth is 3 slices, ergo 1.5s subtracted from 6s */
}

.facet:nth-child(4) .outerCorner,
.facet:nth-child(5) .innerCorner {
  transform-origin: top right;
}

.facet:nth-child(9) .outerCorner,
.facet:nth-child(8) .innerCorner {
  bottom: 0;
  transform-origin: bottom right;
}

.slice:nth-child(7) .outerCorner,
.slice:nth-child(8) .innerCorner {
  --anchorDir: 1;
}

.slice:nth-child(8) .outerCorner,
.slice:nth-child(7) .innerCorner {
  --anchorDir: -1;
}

.slice:nth-child(7) :is(.facet:nth-child(4), .facet:nth-child(8)) > div, /* the top left and bottom right outer corners*/
.slice:nth-child(8) :is(.facet:nth-child(5), .facet:nth-child(9)) > div /* the bottom left and top right inner corners */ {
  --tdir: 1;
  background: linear-gradient(#bf0,#0a0);
}

.slice:nth-child(8) :is(.facet:nth-child(4), .facet:nth-child(8)) > div, /* the bottom left and top right outer corners*/
.slice:nth-child(7) :is(.facet:nth-child(5), .facet:nth-child(9)) > div /* the top left and bottom right inner corners*/ {
  --tdir: -1;
  background: linear-gradient(#f50,#f90);  
}


/* and last but definitely not least: turn directions for the evil chompers */

.slice:nth-child(10) .lefTooth, .slice:nth-child(13) .righTooth {
  --tdir: 1;
}

.slice:nth-child(10) .righTooth, .slice:nth-child(13) .lefTooth {
  --tdir: -1;
}

/* mask for the goof's eyeholes */

:is(.slice:nth-child(18),.slice:nth-child(19)) :is(.facet:nth-child(4),.facet:nth-child(5), .facet:nth-child(8), .facet:nth-child(9)) {
  mask-image: radial-gradient(circle at var(--hAnchor) var(--vAnchor), transparent #{$sliceW}, black #{$sliceW});
  -webkit-mask-image: radial-gradient(circle at var(--hAnchor) var(--vAnchor), transparent #{$sliceW}, black #{$sliceW});
}

.slice:nth-child(18) :is(.facet:nth-child(4),.facet:nth-child(5),.facet:nth-child(8),.facet:nth-child(9)) {
  --hAnchor: left;
}

:is(.slice:nth-child(18),.slice:nth-child(19)) :is(.facet:nth-child(4),.facet:nth-child(8)) {
  --vAnchor: bottom;
}

.slice:nth-child(19) :is(.facet:nth-child(4),.facet:nth-child(5),.facet:nth-child(8),.facet:nth-child(9)) {
  --hAnchor: right;
}

:is(.slice:nth-child(18),.slice:nth-child(19)) :is(.facet:nth-child(5),.facet:nth-child(9)) {
  --vAnchor: top;
}

@keyframes lighting {
  0% {
    background-position-x: calc(.5*(var(--nthSlice)*100em*#{math.sin($angle/2)} - 100em*#{math.sin($angle/2)}*var(--latter)));
  }
  100% {
    background-position-x: calc(.5*(100em*#{math.sin($angle/2)}*#{$ngon} + var(--nthSlice)*100em*#{math.sin($angle/2)} - 100em*#{math.sin($angle/2)}*var(--latter)));
  }
}

@keyframes spin {
  0% {
    transform: rotate(-90deg) rotateY(130deg); /* 130 */
  }
  100% {
    transform: rotate(-90deg) rotateY(-230deg);
  }
}

@keyframes glow {
  0%, 66.66%, 100% {
    filter: brightness(.2);
  }
  33.33% {
    filter: brightness(1);
  }
}

@keyframes counterspin {
  0% {
    transform: translateZ(15em) rotateY(-130deg) scale(.4) rotate(0);
  }
  100% {
    transform: translateZ(15em) rotateY(230deg) scale(.4) rotate(1440deg);
  }  
}

@keyframes flatColor {
  0%, 100% {
    background-color: #050;
  }
  25%, 75% {
    background-color: #080400;
  }
  50% {
    background-color: #f60;
  }
}

@keyframes looseTeeth {
  0% {
    transform: skewY(15deg) rotate(var(--turnTooth));
  }
  100% {
    transform: skewY(-15deg) rotate(var(--turnTooth));
  }
}

@keyframes eyeRoll {
  0% {
    transform: rotateY(90deg) translateZ(-15em) rotate(0deg);
  }
  100% {
    transform: rotateY(90deg) translateZ(-15em) rotate(360deg);
  }
}

@keyframes rollGlow {
  0% {
    background-position-y: calc(-1*var(--lazyStep)*var(--lazyH)  + .5*var(--lazyH));
  }
  100% {
    background-position-y: calc(-1*var(--lazyStep)*var(--lazyH)  + .5*var(--lazyH) + 12*var(--lazyH));
  }
}

/* the small pumpkin inside the goof's mouth */

.lilPump {
  position: absolute;
  display: flex;
  place-self: center;
  justify-content: center;
  width: 100%;
  aspect-ratio: 1;
  perspective: 10em;
  border-radius: 50%;
  overflow: hidden;
  background: radial-gradient(#000 8%,#0000 8%), conic-gradient(#110800,#630,#110800,#040,#110800);
  animation: counterspin 12s linear infinite;
}

.lilPump:after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 50%;
  /* box-shadow: inset -15em -15em 15em #000d; */
}

.lilPump > div {
  position: absolute;
  --ngon: #{$ngon/2};
  --lilW: calc(#{math.tan($angle*2)}*50em);
  width: var(--lilW);
  height: 50em;
  bottom: 50%;
  transform-style: preserve-3d;
}

@for $i from 1 through $ngon/2 {
  .lilPump > div > div:nth-child(#{$i}) {
    --lilStep: #{$i + 1};
  }
}

.lilPump > div > div {
  content: '';
  position: absolute;
  inset: 0;
  transform-origin: 50% 100%;
  transform: rotate(calc(var(--lilStep)*-2*var(--offset)));
} 

.lilPump .segments div {
  transform: rotate(calc(var(--lilStep)*-2*var(--offset))) rotateX(90deg) translateZ(50em);
  background-image: repeating-linear-gradient(90deg, #050,#080400,#f60,#080400,#050);
  background-size: calc(var(--lilW)*var(--ngon)/2) 100%;
  animation: whee 4s linear infinite;
}

.lilPump .holes div:nth-child(2), .lilPump .holes div:nth-child(4) {
  background-image: radial-gradient(at 52% 57%, black 5em, transparent 4em), repeating-conic-gradient(#630,#010,#630 50%);
  mask-image: radial-gradient(at 52% 52%, black 6em, transparent 4em);
  -webkit-mask-image: radial-gradient(at 52% 52%, black 6em, transparent 4em);
}

.lilPump .holes div:nth-child(n+6) {
  clip-path: polygon(0 0,100% 0, 50% 100%);
  background-image: radial-gradient(circle at 52% 37%, black 9em, transparent 9em), conic-gradient(from -85deg at 52% 35%, #040 ,#210 170deg 210deg,#010 300deg, #040);
  mask-image: radial-gradient(circle at 52% 35%, black 11em, transparent 11em);
  -webkit-mask-image: radial-gradient(circle at 52% 35%, black 11em, transparent 11em);
}

.lilPump .holes div:nth-child(6) {
  clip-path: polygon(0 0,100% 0, 100% 100%, 50% 100%);
}

.lilPump .holes div:nth-child(12) {
  clip-path: polygon(0 0,100% 0, 50% 100%, 0 100%);
}

@keyframes rotfl {
  0% {
    rotate: 0;
  }
  100% {
    rotate: 360deg;
  }
}

@keyframes whee {
  0% {
    background-position-x: calc(var(--lilW)*var(--lilStep)/2);
  }
  100% {
    background-position-x: calc((var(--lilW)*var(--lilStep) - var(--lilW)*var(--ngon))/2);
  }
}

input {
  display: none;
}

.startBtn {
  display: flex;
  height: 15em;
  aspect-ratio: 1;
  justify-self: center;
  z-index: 1;
  position: absolute;
  bottom: calc(50% + 5em);
  background-image: conic-gradient(from 90deg, #210 calc(180deg - #{math.atan(1)}), #bf0 calc(180deg - #{math.atan(1)}), #0a0 calc(180deg + #{math.atan(1)}), #f50 calc(180deg - #{math.atan(1)}), #f90);
  mask-image: conic-gradient(from calc(270deg - #{math.atan(.5)}) at 100% 50%, black calc(2*#{math.atan(1)}), transparent calc(2*#{math.atan(1)}));
  -webkit-mask-image: conic-gradient(from calc(270deg - #{math.atan(.5)}) at 100% 50%, black calc(2*#{math.atan(.5)}), transparent calc(2*#{math.atan(.5)}));
  animation: wiggle 5s linear infinite;
  transition: all .3s ease-in-out;
}

@keyframes wiggle {
  0%, 5%, 15%, 100% {
    transform: skewY(0);
  }
  2.5%, 12.5% {
    transform: skewY(-10deg);
  }
  7.5% {
    transform: skewY(10deg);
  }
}

.startBtn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: #000;
  scale: .666;
  mask-image: conic-gradient(from calc(270deg - #{math.atan(.5)}) at 100% 50%, black calc(2*#{math.atan(.5)}), transparent calc(2*#{math.atan(.5)}) );
  -webkit-mask-image: conic-gradient(from calc(270deg - #{math.atan(.5)}) at 100% 50%, black calc(2*#{math.atan(.5)}), transparent calc(2*#{math.atan(.5)}) );
  transition: inherit;
}

.startBtn:hover::before  {
  transform: scale(.666);
}

#start:checked ~ :is(.startBtn,.CTA) {
  display: none;
}

#start:checked ~ .playBtn {
  display: flex;
}

.playBtn {
	display: none;
	width: 20em;
	aspect-ratio: 1;
  margin: 5em;
	background: linear-gradient(#f60,#050);
  position: absolute;
  transition: .3s ease-in-out;
  /* justify-content:space-around; */ /* probably redundant, scaling doesn't look at layout, transforms from the middle by default, so it will be centered regardless*/
}

.playBtn:hover {
  filter: hue-rotate(150deg) brightness(1.5);
}

.playBtn div {
  position: relative;
  width: 50%;
  height: 100%;
  padding: 1px;
  margin: -1px;
  perspective: 0;
  perspective-origin: calc(50% + 0%*var(--dir)) 0;
  transform: scale(.5);
  transition: .3s ease-in-out;
  transform-origin: calc(50% - 31%*var(--dir)) 50%;
}

.playBtn div:nth-child(1) {
  --dir: -1;
}

.playBtn div:nth-child(2) {
  --dir: 1;
}

.playBtn div:before {
  content: '';
  position: absolute;
  width: 100%;
  height: 100%;
  background: #000;
  rotate: x 0deg;
  transform-origin: 50% 100%;
  transition: .3s ease-in-out;
}

#playPause:checked ~ .playBtn {
  rotate: -90deg;
}

#playPause:checked ~ .playBtn div {
  perspective-origin: calc(50% + 50%*var(--dir)) 0;
  transform: scale(1);
}

#playPause:checked ~ .playBtn div:before {
  rotate: x 6deg;
}

#start:not(:checked) ~ .scene *,
#start:not(:checked) ~ .scene *::before,
#start:not(:checked) ~ .scene *::after, 
#playPause:checked ~ .scene *,
#playPause:checked ~ .scene *::before,
#playPause:checked ~ .scene *::after  {
  animation-play-state: paused;
}

@media (orientation: portrait) {
  body {
    font-size: .66vw;
  }

  .CTA {
    width: 100%;
    font-size: 4.9vw;
  }

  .CTA span {
    display: block;
    margin-inline: 1em;
  }

  .playBtn {
    margin: 10em;
    width: 30em;
  }

  @keyframes wiggle {
    0%, 5%, 15%, 100% {
      transform: skewY(0);
    }
    2.5%, 12.5% {
      transform: skewY(-20deg);
    }
    7.5% {
      transform: skewY(20deg);
    }
  }
}
!

JS 

              
                /*

So there it is: this new pumpkin I've been slowly growing and carving throughout the year. Didn't make it for Halloween, got slowed down by some failed experiments in faux shading. I had some crazy ideas, but they were either too CPU-heavy or glitchy, so I went back to my original concept of linear-gradient based shading.
New things I learned: the :is pseudo-class - which I finally figured out, after some failed attempts in the past. Also, the :empty pseudo-class - which KP did a tutorial about just as I was looking for some way to target empty and non-empty divs. And last but not least - some more experiments with masks, which I used instead of clip-paths on the whole goofy face.
Things I need to work on: naming classes and variables. I like camel-case, but out of fear of going into full JS-style frenzy I often mix in acronyms. Idea to try out next time: concatenating several classes.
And while I still try to avoid JS - purely out of spite - I do love Pug and SCSS very much.

I discuss the construction of the sphere for this pumpkin on my blog at:

https://dev.to/mackfitz/approximating-a-sphere-using-css-and-pumpkins-1dle

https://mackfitz.hashnode.dev/approximating-a-sphere-using-css-and-pumpkins

*/
!
999px

Console