Infinite Loop | Learning Axis

HTML

CSS

body {
  margin: 0;
  background: #000;
  overflow: hidden;
  display: grid;
  height: 100vh;
  place-items: center;
  container-type: size;
}
.container {
  position: relative;
  display: flex;
  font-size: min(.9cqh, .45cqw);
  --h: 100em;
  height: var(--h);
  width: calc(2*var(--h) - 5.5em);
}
.wrapper {
  position: absolute;
  height: 100%;
  width: unset;
  aspect-ratio: 1;
  display: grid;
  &:nth-child(2 of .wrapper) {
    right: 0;
    bottom: unset;
  }
}
.swirl {
  position: absolute;
  inset: 0;
  --dur: 10s;
  display: grid;
  align-items: center;
  justify-items: unset;
  animation: spin var(--dur) linear infinite;
  :nth-child(2 of .wrapper) & { animation-direction: reverse; }
}
span {
  position: absolute;
  width: 50%;
  height: unset;
  color: #fff;
  font-family: monospace;
  font-weight: bold;
  font-size: calc(var(--h)/10);
  rotate: calc(360deg/28*var(--nth)*var(--dir));
  animation: fade var(--dur) linear infinite;
  animation-delay: calc(-1*var(--dur)/28 * var(--nth));
  --glow: hsl(calc(360deg/28*var(--nth)) 100% 50%);
  text-shadow: 0 0 1em var(--glow), 0 0 .5em var(--glow), 0 0 .25em var(--glow);
  &:nth-child(1) { --nth: 1;}
  &:nth-child(2) { --nth: 2;}
  &:nth-child(3) { --nth: 3;}
  &:nth-child(4) { --nth: 4;}
  &:nth-child(5) { --nth: 5;}
  &:nth-child(6) { --nth: 6;}
  &:nth-child(7) { --nth: 7;}
  &:nth-child(8) { --nth: 8;}
  &:nth-child(9) { --nth: 9;}
  &:nth-child(10) { --nth: 10;}
  &:nth-child(11) { --nth: 11;}
  &:nth-child(12) { --nth: 12;}
  &:nth-child(13) { --nth: 13;}
  &:nth-child(14) { --nth: 14;}
  &:nth-child(15) { --nth: 15;}
  &:nth-child(16) { --nth: 16;}
  &:nth-child(17) { --nth: 17;}
  &:nth-child(18) { --nth: 18;}
  &:nth-child(19) { --nth: 19;}
  &:nth-child(20) { --nth: 20;}
  &:nth-child(21) { --nth: 21;}
  &:nth-child(22) { --nth: 22;}
  &:nth-child(23) { --nth: 23;}
  &:nth-child(24) { --nth: 24;}
  :nth-child(1 of .wrapper) & {
    left: 50%;
    text-align: end;
    transform-origin: 0% 50%;
    --dir: 1;
    animation-direction: reverse;
  }
  :nth-child(2 of .wrapper) & {
    right: 50%;
    text-align: start;
    transform-origin: 100% 50%;
    --dir: -1;
  }
}
@keyframes spin {
  100% { rotate: 360deg; }
}
@keyframes fade {
  0%, 10% { opacity: 0; }
  55%, 100% { opacity: 1; }
}
@media (orientation: portrait) {
  .container {
    font-size: min(.9cqw,.45cqh);
    width: var(--h);
    height: calc(2*var(--h) - 11.5em);
  }
  .wrapper {
    width: 100%;
    height: unset;
    right: unset;
    bottom: 0;
  }
  .swirl {
    justify-items: center;
    align-items: unset;
  }
  span {
    height: 50%;
    width: unset;
    display: grid;
    :nth-child(1 of .wrapper) & {
      bottom: 50%;
      left: unset;
      text-align: end;
      transform-origin: 50% 100%;
      --dir: 1;
      animation-direction: reverse;
    }
    :nth-child(2 of .wrapper) & {
      top: 50%;
      right: unset;
      text-align: start;
      transform-origin: 50% 0%;
      --dir: -1;
      align-items: end;
    }
  }
}