JSFiddle - React, Tailwind, and code Playground

HTML

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

CSS

.one {
    width: 100px;
    height: 100px;
    background: red;
    -webkit-box-shadow: -1px -1px 5px rgba(50, 50, 50, 0.75);
    -moz-box-shadow:    -1px -1px 5px rgba(50, 50, 50, 0.75);
    box-shadow:         -1px -1px 5px rgba(50, 50, 50, 0.75);
}
.two {
    width: 100px;
    height: 100px;
    background: red;
    -webkit-box-shadow: -1px -1px 13px rgba(50, 50, 50, 0.75);
    -moz-box-shadow:    -1px -1px 13px rgba(50, 50, 50, 0.75);
    box-shadow:         -1px -1px 13px rgba(50, 50, 50, 0.75);
}

JavaScript

setInterval(function() {
    if( $("div").hasClass("one"))
    {
    $("div").removeClass("one").addClass("two");
    }
    else
    {
          $("div").removeClass("two").addClass("one");
    }
}, 10);