JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://code.jquery.com/jquery-2.2.3.min.js"></script>
<header>
 <div>element 1</div>
 <div>element 2</div>
 <div>element 3</div>
 <div>element 4</div>
</header>

CSS

.highlight {
   color:#f00; 
}

JavaScript

var highlight = function(){
$('header div').removeClass('highlight');
$('header div').each(function(i,v) {
setTimeout(function(){$(v).prev().toggleClass('highlight');$(v).toggleClass('highlight');}, i*1000);
});
setTimeout(highlight, ($('header div').length)*1000);
};
highlight();