JSFiddle - React, Tailwind, and code Playground

HTML

<div id="box"></div>

CSS

#box {
  margin-left:30px;
  width: 3px;
  height: 100px;
  background: #aaa;
}

JavaScript

$(function() {
  $('#box').animate({
    'marginTop': '1000px'
  },1000);
  $('#box').animate({
    'marginTop': '0px'
  },1000);
    $('#box').animate({
    'marginTop': '0px'
  },1000);
  $('#box').animate({
    'marginTop': '1000px'
  },1000);
});