JSFiddle - React, Tailwind, and code Playground

HTML

<div class="pointBlock__circle-2"></div>

CSS

.pointBlock__circle-2 {
 width:20px;
 height:20px;
 border-radius:50%;
margin-left: 30px;
margin-top: 30px;
 background:#4af3ff;
 
 -webkit-animation:radar 2s linear infinite;
 animation:radar 2s linear infinite
}

@keyframes radar {
 0% {
  -webkit-transform:scale(.3,.3);
  transform:scale(.3,.3);
  opacity:1
 }
 100% {
  -webkit-transform:scale(4,4);
  transform:scale(4,4);
  opacity:0
 }
}