style.css

.pixel-spinner,
.pixel-spinner * {
  box-sizing: border-box;
}

.pixel-spinner {
  height: 95vh;
  width: 98vw;
  display: flex;
  flex-direction: row;
  justify-content: center;
  align-items: center;
}

.pixel-spinner .pixel-spinner-inner {
  width: calc(70px / 7);
  height: calc(70px / 7);
  background-color: #ff1d5e;
  color: #ff1d5e;
  box-shadow: 15px 15px 0 0, -15px -15px 0 0, 15px -15px 0 0, -15px 15px 0 0,
    0 15px 0 0, 15px 0 0 0, -15px 0 0 0, 0 -15px 0 0;
  animation: pixel-spinner-animation 2000ms linear infinite;
}

@keyframes pixel-spinner-animation {
  50% {
    box-shadow: 20px 20px 0px 0px, -20px -20px 0px 0px, 20px -20px 0px 0px,
      -20px 20px 0px 0px, 0px 10px 0px 0px, 10px 0px 0px 0px, -10px 0px 0px 0px,
      0px -10px 0px 0px;
  }
  75% {
    box-shadow: 20px 20px 0px 0px, -20px -20px 0px 0px, 20px -20px 0px 0px,
      -20px 20px 0px 0px, 0px 10px 0px 0px, 10px 0px 0px 0px, -10px 0px 0px 0px,
      0px -10px 0px 0px;
  }
  100% {
    transform: rotate(360deg);
  }
}