JSFiddle - React, Tailwind, and code Playground

HTML

<div class="shadow-point">
  
</div>

CSS

body {
  background-color: black;
}

.shadow-point {
  width: 50px;
  height: 50px;
  background-color: white;
  margin: 200px 0 0 200px;
  border-radius: 50%;
  animation: shadow 1s infinite alternate;
}

@keyframes shadow {
  from {
    box-shadow: 0 0 55px 10px white;
  }
  to {
    box-shadow: 0 0 90px 20px white;
  }
}