.loader {
  --c-1: #a2ff37;
  --c-2: #5bb2ff;
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.layer {
  font-size: 25px;
  font-family: "Segoe UI", Tahoma;
  font-weight: 800;
  text-transform: uppercase;
  position: absolute;
}

.layer:nth-child(1) {
  color: var(--c-1);
  animation: kfs-3412 0.5s infinite;
}

.layer:nth-child(2) {
  color: var(--c-2);
  animation: kfs-3412 0.5s 0.25s infinite;
}

@keyframes kfs-3412 {
  0% {
    text-shadow: 0 0 30px var(--c-1);
    transform: scaleY(0);
    z-index: 2;
  }
  50% {
    transform: scaleY(1.5);
    z-index: 2;
  }
  100% {
    transform: scaleY(1.5);
    z-index: 0;
  }
}