Berlin Map - Pulse for the Active location

Berlin Map Style:

#overlay .marker.active {
  animation: pulseplus 1.2s infinite; /* adjust for the pulse speed */
}

#overlay .marker.active:before{
  width: 0 !important;
  height: 0 !important;
}

Code Plugin:

Add the below code in the Head section. (This code defines the animation, that will be from 3 steps)

<style>
@keyframes pulseplus {
  0% {
    transform: scale(1);
    box-shadow: 0 0 0 0 rgba(255, 0, 0, 0.7); /* pulse color and transparency */
  }
  70% {
    transform: scale(1.2); /* adjust for the size of the pulse */
    box-shadow: 0 0 0 10px rgba(255, 0, 0, 0); /* pulse color and transparency */
  }
  100% {
    transform: scale(1);
    box-shadow: 0 0 0 0 rgba(255, 0, 0, 0); /* pulse color and transparency */
  }
}
</style>

Preview: