JSFiddle - React, Tailwind, and code Playground

HTML

<button id="start" type="button">Start</button>
<div id="a">
    <div></div>
</div>

JavaScript

$('#start').click(function(){
    var $a = $('#a'),
        $span = $a.find('div:last'),
        i = 0,
        j,
        str;
    setInterval(function(){
        str = '';
        j = i + 1;
        while(j--){
            str += '.....';
        }
        $span.text(str);
        i++;
        if (i === 5){
            i = 0;
            $a.append('<div />');
            $span = $a.find('div:last');
        }
    }, 200);
});