mempool/frontend/src/app/components/clock/clock.component.scss

.clock-wrapper {
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  bottom: 0;
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;

  --clock-width: 300px;

  .clockchain-bar, .clock-face {
    flex-shrink: 0;
    flex-grow: 0;
  }

  .clockchain-bar {
    position: relative;
    width: 100%;
    height: 15.625%;
    z-index: 2;
    overflow: hidden;
    // background: #1d1f31;
    // box-shadow: 0 0 15px #000;
  }

  .clock-face {
    position: relative;
    height: 84.375%;
    margin: auto;
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1;
  }
}

.title-wrapper {
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  bottom: 0;
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: center;

  .block-height {
    font-size: calc(0.2 * var(--clock-width));
    padding: 0;
    margin: 0;
    background: radial-gradient(rgba(0,0,0,0.5), transparent 67%);
    padding: calc(0.05 * var(--clock-width)) calc(0.15 * var(--clock-width));
  }
}

.block-wrapper {
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  bottom: 0;
  width: 100%;
  height: 100%;

  .block-sizer {
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
  }

  .fader {
    position: absolute;
    left: 0;
    right: 0;
    top: 0;
    bottom: 0;
    background: radial-gradient(transparent 0%, transparent 48%, #11131f 62%, #11131f 100%);
  }

  .block-cube {
    --side-width: calc(0.4 * var(--clock-width));
    --half-side: calc(0.2 * var(--clock-width));
    --neg-half-side: calc(-0.2 * var(--clock-width));
    transform-style: preserve-3d;
    animation: block-spin 60s infinite linear;
    position: absolute;
    z-index: -1;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: var(--side-width);
    height: var(--side-width);

    .side {
      width: var(--side-width);
      height: var(--side-width);
      line-height: 100px;
      text-align: center;
      background: #232838;
      display: block;
      position: absolute;
    }

    .side.top {
      transform: rotateX(90deg); 
      margin-top: var(--neg-half-side);
    }

    .side.bottom {
      background: #105fb0;
      transform: rotateX(-90deg); 
      margin-top: var(--half-side);
    }

    .side.right {
      transform: rotateY(90deg); 
      margin-left: var(--half-side);
    }

    .side.left {
      transform: rotateY(-90deg); 
      margin-left: var(--neg-half-side);
    }

    .side.front {
      transform: translateZ(var(--half-side));
    }

    .side.back {
      transform: translateZ(var(--neg-half-side));
    }
  }
}

@keyframes block-spin {
  0% {transform: translate(-50%, -50%) rotateX(-20deg) rotateY(0deg);}
  100% {transform: translate(-50%, -50%) rotateX(-20deg) rotateY(-360deg);}
}