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HTML 

              
                <div id="wrapper">

<input id="play" type="checkbox" name="click">

<div id="scene">
  <div id="container">
    <div class="shoal">
      <div class="anchor">
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
      </div>
      <div class="anchor">
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
      </div>
      <div class="anchor">
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
      </div>
      <div class="anchor">
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
      </div>
      <div class="anchor">
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
      </div>
      <div class="anchor">
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
      </div>
    </div>
    <div class="shoal">
      <div class="anchor">
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
      </div>
      <div class="anchor">
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
      </div>
      <div class="anchor">
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
      </div>
      <div class="anchor">
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
      </div>
      <div class="anchor">
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
      </div>
      <div class="anchor">
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
        <div class="arm"></div>
      </div>   
    </div>
    <div id="light">
    <label id="pressed" for="play"></label>
    </div> 
  </div>
</div>
<div id="overlay"></div>
</div>
!

CSS 

              
                body {
  margin: 0;
}

#wrapper {
  display: grid;
  position: absolute;
  height: 100vh;
  height: -webkit-fill-available;
  width: 100%;
  background: #011;
  margin: 0;
  padding: 0;
  place-content: center;
  overflow: hidden;
  font-size: .33vw;
}

#play {
  position: absolute;
  display: none;
}

#pressed {
  position: relative;
  background: yellow;
  font-size: 10em;
  font-family: Arial Black;
  color: red;
  pointer-events: auto;
  display: grid;
  place-items: center;
  transition: transform .3s ease-in-out;
}

#pressed:hover {
  transform: scale(1.33);
}

#play:not(:checked) + #scene *,
#play:not(:checked) + #scene .arm:before
{
animation-play-state: paused;
}

#play:not(:checked) + #scene #pressed:after {
  content: '\0025BA';
}

#pressed:after {
  content: 'II';
  position: absolute;
  padding: 1.25em;
}

#scene {
  width: 100em;
  aspect-ratio: 1;
  perspective: 100em;
  position: relative;
  pointer-events: none;
}

#scene *:not(#pressed) {
  transform-style: preserve-3d;
  position: absolute;
}

#container, #light, .shoal {
  inset: 0;
}

#overlay {
  transform-style: flat;
  position: absolute;
  background: conic-gradient(#f00,#ff0,#0f0,#0ff,#00f,#f0f,#f00);
  inset: 0;
  mix-blend-mode: hue;
  pointer-events: none;
}

#light {
  background: radial-gradient(#fff 20%, #40fb 25%, #0008 50%,#0000 70%);
  display: grid;
  place-items: center;
}

.shoal {
  animation: float 32s ease-in-out infinite;*/
}

.shoal:nth-child(1) > .anchor {
  --flip: 0;
}

.shoal:nth-child(2) > .anchor {
  --flip: 1;
}

.shoal:nth-child(2) {
  animation-delay: -.5s;
}

@keyframes float {
  0%, 33.33%, 66.66%, 100% {
    transform: rotateY(0deg) rotateX(0deg) rotate(0deg);
  }
  16.66% {
    transform: rotateY(180deg) rotateX(0deg) rotate(0deg);
  }
  50% {
    transform: rotateY(0deg) rotateX(0deg) rotate(180deg);
  }
  83.33% {
    transform: rotateY(0deg) rotateX(180deg) rotate(0deg);
  }
}

.anchor {
  inset: 30%;
  display: grid;
  animation: twirl 32s ease-in-out infinite;
  animation-delay: calc(var(--nStar)*-.2s);
}

@keyframes twirl {
  0%, 25%, 50%, 75%, 100% {
    transform: rotateY(var(--turn)) rotateZ(var(--incline)) translateY(-50em) rotateY(0deg) rotateX(0deg) scaleY(.25);
  }
  12.5% {
    transform: rotateY(var(--turn)) rotateZ(var(--incline)) translateY(-50em) rotateY(-360deg) rotateX(0deg) scaleY(.25);
  }
  37.5% {
    transform: rotateY(var(--turn)) rotateZ(var(--incline)) translateY(-50em) rotateY(0deg) rotateX(-360deg) scaleY(.25);
  }
  62.5% {
    transform: rotateY(var(--turn)) rotateZ(var(--incline)) translateY(-30em) rotateY(0deg) rotateX(0deg) scaleY(-.5);
  }

  66.66% {
    transform: rotateY(var(--turn)) rotateZ(var(--incline)) translateY(-30em) rotateY(0deg) rotateX(0deg) scaleY(-.25);
  }
  70.33% {
    transform: rotateY(var(--turn)) rotateZ(var(--incline)) translateY(-30em) rotateY(0deg) rotateX(0deg) scaleY(.66);
  }
}

.anchor:nth-child(1) {
  --nStar: 1;
  --turn: 0;
  --incline: calc(180deg - var(--flip)*180deg);  
}

.anchor:not(:nth-child(1)) {
  --turn: calc(var(--nStar)*72deg + 36deg);
  --incline: calc(63.434948822922deg + var(--flip)*180deg);
}

.anchor:nth-child(2) {
  --nStar: 2;
}

.anchor:nth-child(3) {
  --nStar: 3;
}

.anchor:nth-child(4) {
  --nStar: 4;
}

.anchor:nth-child(5) {
  --nStar: 5;
}

.anchor:nth-child(6) {
  --nStar: 6;
}

.star {
  inset: 0;
  background: gray;
  border-radius: 50%;
  transform: rotateX(90deg);
  background: hsl( calc(var(--nStar)*60deg) 100% 50%);
}

.arm {
  height: 50.903696045513%;
  width: 29.389262614624%;
  justify-self: center;
  top: calc(50% - 30.901699437495%);
  left:50%;
  clip-path:polygon(0 0, 0 100%, 100% 100%);
  transform-origin: 0% 0;
  transform: scaleX(var(--mirror)) rotatey(calc(var(--nArm)*72deg)) rotateX(51.527433093281deg);
}

.arm:before {
  position: absolute;
  background: linear-gradient(#f00 6%,#000 6% 18%,#ff0 18% 24%,#000 24% 36%,#0f0 36% 42%,#000 42% 54%,#0ff 54% 60%,#000 60% 72%,#00f 72% 78%,#000 78% 90%,#f0f 90% 100%);
    background-position-x: 0%;
    background-position-y: 0%;
    background-repeat: repeat;
    background-size: auto;
  inset: 0;
  content: '';
  transform-style: preserve-3d;
  backface-visibility: hidden;
  transform: skewY(30deg);
  transform-origin: 100% 100%;
  background-repeat: no-repeat;
  background-position: 100% 100%;
  background-size: 200% 100%;
}

.anchor:nth-child(2n) .arm:before {
  animation: switch 32s ease-in-out infinite;
}

.anchor:nth-child(2n+1) .arm:before {
  animation: pulse 32s ease-in-out infinite;
}

.anchor .arm:before {
  animation-delay: calc(var(--nStar)*-.2s);;
}


@keyframes switch {
  0%, 66.66%, 100% {
    transform: skewY(30deg);
    transform-origin: 100% 0;
  }
  72.11%,94.5% {
    transform: skewY(0deg);
    transform-origin: 100% 0;
  }
  72.111%, 94.499% {
    transform: skewY(0deg);
    transform-origin: 0% 0;
  }
  83.11% {
    transform: skewY(-70deg);
    transform-origin: 0% 0;
  }
}

@keyframes pulse {
  0%, 80% {
    filter: hue-rotate(0deg);
  }
  100% {
    filter: hue-rotate(1080deg);
  }
} 


.arm:nth-child(2n) {
  --mirror: 1;
}

.arm:nth-child(2n+1) {
  --mirror: -1;
}

.arm:nth-child(1),.arm:nth-child(2) {
  --nArm: 1;
}

.arm:nth-child(3),.arm:nth-child(4) {
  --nArm: 2;
}

.arm:nth-child(5),.arm:nth-child(6) {
  --nArm: 3;
}

.arm:nth-child(7),.arm:nth-child(8) {
  --nArm: 4;
}

.arm:nth-child(9),.arm:nth-child(10) {
  --nArm: 5;
}

@keyframes flip {
  100% {
  transform: scaleY(-1);
  }
}

@media (orientation: portrait) {

  #scene {
    font-size: .33vh;
  }

}
!

JS 

              
                /* Took me a while - but it's here: my second deep-sea themed experiment with dodecahedrons. Some fun experiments with gradients, too - though not all I hoped form was feasible (the conic gradient leaving no room for tampering). On the flipside, I managed to improve on previous transform techniques - most notably 'scale' and 'skew'. Things to check for future projects: aranging different "dance routines" into separate animation steps rather than manipulating them with percentages only. The way it is now was pretty chaotic, and more than once I lost track of what happens when. Surprisingly, though, correcting misaligned timelines made the whole sequence dull - so I reverted to the original SNAFU, which has a nicer, more organic flow  */
!
999px

Console