JSFiddle - React, Tailwind, and code Playground

HTML

<div class="aboutUs-column-dscr">1</div>
<div class="aboutUs-column-dscr">2</div>
<div class="aboutUs-column-dscr">3</div>
<div class="aboutUs-column-dscr">4</div>
<div class="aboutUs-column-dscr">5</div>

CSS

.aboutUs-column-dscr {
    color: red;
}

JavaScript

var bestValues = document.querySelectorAll('.aboutUs-column-dscr');
var i = 0;
var interval = setInterval(function(){
    bestValues[i].style.color = "green";
    i++;
    if(i === bestValues.length) {
        clearInterval(interval);
    }
}, 1000);