function eridaniTime() {
    let date = new Date();
    let hours = date.getUTCHours()
    let minutes = date.getUTCMinutes()
    let seconds = date.getUTCSeconds()
    let milliseconds = date.getUTCMilliseconds();
    let secondsToday = (hours * 3600) + (minutes * 60) + seconds +  (milliseconds / 1000);

    document.getElementById("clock-eridani").innerText =
        appendLeadingZeros(((secondsToday / 2.366).toString(6).split(".")[0]), 6);
}

function humanTime() {
  let date = new Date();
  let hours = date.getUTCHours()
  let minutes = date.getUTCMinutes()
  let seconds = date.getUTCSeconds()
  let milliseconds = date.getUTCMilliseconds();
  let secondsToday = (hours * 3600) + (minutes * 60) + seconds +  (milliseconds / 1000);

  document.getElementById("clock-human").innerText =
    appendLeadingZeros(secondsToday.toString(10).split(".")[0], 5);
}

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

function tick() {
  setInterval(eridaniTime, 2366);
}

function tock() {
  setInterval(humanTime, 1000);
}

document.addEventListener("DOMContentLoaded", function() {
  eridaniTime();
  humanTime();
  tick();
  tock();
});