function updateClock() {
  var now = new Date();
  var hour = now.getHours();
  var minute = now.getMinutes();
  var second = now.getSeconds();

  var hourHand = document.getElementById("hour-hand");
  var minuteHand = document.getElementById("minute-hand");
  var secondHand = document.getElementById("second-hand");


  var hourDeg = (hour % 12) * 30 + minute / 2;
  var minuteDeg = minute * 6;
  var secondDeg = second * 6;

  hourHand.style.transform = `rotate(${hourDeg}deg)`;
  minuteHand.style.transform = `rotate(${minuteDeg}deg)`;
  secondHand.style.transform = `rotate(${secondDeg}deg)`;

  setTimeout(updateClock, 1000);
}

updateClock();