<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8" />
  <meta name="viewport" content="width=device-width, initial-scale=1.0"/>
  <title>Full Screen Clock</title>
  <style>
    html, body {
      margin: 0;
      padding: 0;
      height: 100%;
      width: 100%;
      background-color: black;
      color: red;
      font-family: monospace;
      display: flex;
      justify-content: center;
      align-items: center;
    }

    #clock {
      font-size: 20vw;
      line-height: 1;
      text-a