JSFiddle - React, Tailwind, and code Playground

HTML

Swatch time <span id="time"></span> .beats

JavaScript

function startTime() {
    var d = new Date();
    var h = d.getHours();
    var m = d.getMinutes();
    var s = d.getSeconds();
    var tzoff = 60 + d.getTimezoneOffset();
    var time = '@' + ('000'+Math.floor((h * 3600 + (m + tzoff) * 60 + s) / 86.4) % 1000).slice(-3);

    $('#time').html(time);
}

startTime();