function earthTime() {
    let date = new Date();
    let hours = date.getUTCHours()
    let minutes = date.getUTCMinutes()
    let seconds = date.getUTCSeconds()

    document.getElementById("clock").innerText =
        appendLeadingZeros(((hours * 3600) + (minutes * 60) + seconds).toString(6));

    setTimeout(function () {
        earthTime()
    }, 1000);
}

function appendLeadingZeros(time) {
    while (time.length < 7) {
        time = "0" + time;
    }
    return time;
}

earthTime();