.pointer {
  z-index: 999;
  position: fixed;
  background-color: #2696e8;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  pointer-events: none;
  box-shadow: 0 0 20px #2696e8, 0 0 60px #2696e8, 0 0 100px #2696e8;
  animation: colors 5s infinite;
  transform: translate(-50%, -50%);
  display: none;
}

@keyframes colors {
  0% {
    filter: hue-rotate(0deg);
  }
  100% {
    filter: hue-rotate(360deg);
  }
}

.pointer:before {
  content: "";
  position: absolute;
  background-color: #2696e8;
  width: 50px;
  height: 50px;
  opacity: 0.2;
  transform: translate(-30%, -30%);
  border-radius: 50%;
}