JSFiddle - React, Tailwind, and code Playground

HTML

<span>Block 01</span>
<span>Block 02</span>
<span>Block 03</span>

CSS

span {display:none;}

JavaScript

function flow(elem) {
    el = $(elem);
    el.fadeIn('slow').delay(3000).fadeOut('slow', function() {
        nextElem = el.is(':last-child') ? el.siblings(':eq(0)') : el.next();
        flow(nextElem);
    });
}
$(document).ready(function() {
    flow('span:eq(0)')
})