style.css

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

.container {
  position: relative;
  width: 100%;
  min-height: 100vh;
  background: #131313;
  overflow: hidden;
}

.layer {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 100px;
  height: 250vh;
  background: #fff;
  box-shadow: inset -10px 0 40px rgba(0, 0, 0, 1), 
    inset 10px 0 40px rgba(0, 0, 0, 1), 
    inset -10px 0 10px rgba(255, 255, 0255, 0.25),
    inset 10px 0 10px rgba(255, 255, 255, 0.25),
    0 0 50px rgba(0, 0, 0, 1);
}

.layer.layer1 {
  background: #222 radial-gradient(#6dff73 9px, #000 9px, #000 13px, transparent 13px );
  background-size: 35px 35px;
  transform: translate(-50%, -50%) rotate(45deg);
  z-index: 10;
  animation: animateDots_one 2s linear infinite;
}

.layer.layer2 {
  background: #222 radial-gradient(#db0aff 9px, #000 9px, #000 13px, transparent 13px );
  background-size: 35px 35px;
  transform: translate(-50%, -38%) rotate(45deg);
  z-index: 8;
  animation: animateDots_two 2s linear infinite;
}

.layer.layer3 {
  background: #222 radial-gradient(#03a9f4 9px, #000 9px, #000 13px, transparent 13px );
  background-size: 35px 35px;
  transform: translate(-50%, -62%) rotate(45deg);
  z-index: 8;
  animation: animateDots_two 2s linear infinite;
}

.layer.layer4 {
  background: #222 radial-gradient(#ffc107 9px, #000 9px, #000 13px, transparent 13px );
  background-size: 35px 35px;
  transform: translate(-50%, -50%) rotate(-45deg);
  z-index: 11;
  animation: animateDots_one 2s linear infinite;
}

.layer.layer5 {
  background: #222 radial-gradient(#e91e63 9px, #000 9px, #000 13px, transparent 13px );
  background-size: 35px 35px;
  transform: translate(-50%, -38%) rotate(-45deg);
  z-index: 9;
  animation: animateDots_two 2s linear infinite;
}

.layer.layer6 {
  background: #222 radial-gradient(#0f0 9px, #000 9px, #000 13px, transparent 13px );
  background-size: 35px 35px;
  transform: translate(-50%, -62%) rotate(-45deg);
  z-index: 9;
  animation: animateDots_two 2s linear infinite;
}

@keyframes animateDots_one {
  0% {
    background-position: 0 0;
  }
  100% {
    background-position: 35px -35px;
  }
}

@keyframes animateDots_two {
  0% {
    background-position: 35px -35px;
  }
  100% {
    background-position: 0 0;
  }
}