JSFiddle - React, Tailwind, and code Playground

HTML

<p>red</p>
<p>blue</p>
<p>orange</p>
<p>yellow</p>

CSS

.red {
    color:red;
}

JavaScript

var $p = $('p');

function run(i) {
    $p.removeClass('red').eq(i).addClass('red');
    setTimeout(function() {
        run(i+=1);
    }, 1000);
}
run(0);