JSFiddle - React, Tailwind, and code Playground

HTML

<p id="aaa"></p>
<p id="bbb"></p>

JavaScript

function truncateToString (n, d) { 
    var scale = Math.pow(10, d);
    return (Math.floor(n * scale) / scale).toFixed(d);
}

function updateTime() {
    var currentTime = new Date();
    var hours = currentTime.getHours();
    var minutes = currentTime.getMinutes();
    var seconds = currentTime.getSeconds();
    var hoursB = (hours * 60) * 60;
    var minutesB = minutes * 60;
    var secondsB = seconds;
    var basic = (hoursB + minutesB + secondsB) / 864;
    var descending = basic - 100;

    document.getElementById('aaa').innerHTML = truncateToString(basic, 3);
    document.getElementById('bbb').innerHTML = truncateToString(basic, 1);

    setTimeout(updateTime, 1000);
};
updateTime();