JSFiddle - React, Tailwind, and code Playground

HTML

<div class="div"></div>

CSS

@keyframes animt {
0%{
       transform: scale(.2);
   }
90%{
    transform: scale(1);
    opacity: 1;
   }
100%{
transform: scale(2);
     opacity: .5;
    }
}
div{
  height: 100px;
  width: 100px;
  background: aqua;
  animation: animt 2s infinite;
}