a {
  position: relative;
}

a > .marker {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  display: block;
  height: 20px;
  width: 20px;
  border-radius: 50%;
  background-color: #72689F;
  box-shadow: 0px 0px 10px rgba(0, 0, 0, 0.25);
}

a > .radiation {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  display: block;
  border-radius: 50%;
  transform: translate(-50%, -50%);
  background-image: radial-gradient(transparent, #CAC9DE);
  background-position: center center;
  background-repeat: no-repeat;
  border: 1px solid #72689F;
  animation-name: location_beacon;
  animation-fill-mode: forwards;
  animation-duration: 3s;
  animation-iteration-count: infinite;
  animation-timing-function: ease-out;
}

@keyframes location_beacon {
  0% {
    opacity: 0;
    height: 0px;
    width: 0px;
  }
  70% {
    opacity: 1;
    height: 150px;
    width: 150px;
  }
  100% {
    opacity: 0;
    height: 150px;
    width: 150px;
  }
}