JSFiddle - React, Tailwind, and code Playground

HTML

<button class="start" style="backgound:grey;border:1px solid #333 ;border-radius:7px;padding:8px;">Start Animation</button>

<p>Queue length is: <span></span></p>

<div style="width:50px;height:50px;position:absolute;left:10px;top:100px;background-color:beige;border:1px solid grey;"></div>

JavaScript

$(document).ready(function(){
    $(".start").click(function(){
        var div = $("div");
        div.animate({height: 300}, "slow");
        div.animate({width: 300}, "medium");
        div.animate({height: 80}, "slow");
        div.animate({width: 100}, "slow");

        $("span").text(div.queue().length);   
    });
});