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HTML 

              
                <style>
  
  @import url("https://fonts.googleapis.com/css2?family=Londrina+Solid:wght@100;300;400;900&display=swap");

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
body {
  min-height: 100vh;
  display: grid;
  place-items: center;
  background: #dddddd;
  font-size: 4.5vmin;
}
.fireworks-container {
  position: fixed;
  width: 100%;
  height: 100%;
}
.fireworks-container:nth-of-type(2){
  z-index: 9;
}
.countdown {
  display: flex;
  gap: 1rem;
  font-family: "Londrina Solid", cursive;
  color: rgb(255,255,255);
  filter: 
    drop-shadow(-0.05em -0.05em 0.05em rgba(128, 0, 128,1))
    drop-shadow(0.05em 0.05em 0.05em rgba(0,0,0,1))
    drop-shadow(0 0 .5em rgba(255, 192, 203,.5));
}
.countdown div {
  display: flex;
  flex-direction: column;
  text-align: center;
}
.countdown div .value {
  font-size: 2.5em;
  font-weight: 400;
  /* text-shadow: 0 0 0.05em red, 0 0 0.1em black; */
}
.countdown div .label {
  font-size: 0.8em;
  font-weight: 300;
  background: rgba(255, 192, 203,1);
  color: rgb(0,0,0);
}
.countdown div .yeardigit {
  font-size: 8em;
  line-height: 0.9em;
  font-weight: 900;
  /* text-shadow: 0 0 0.02em red, 0 0 0.05em black; */
}

</style>



<body>
	<div class="fireworks-container"></div>
  <div class="fireworks-container"></div>
	<div class="countdown">
		<div>
			<div class="value days">0</div>
			<div class="label">Tage</div>
			<div class="yeardigit">0</div>
		</div>
		<div>
			<div class="value hours">0</div>
			<div class="label">Stunden</div>
			<div class="yeardigit">0</div>
		</div>
		<div>
			<div class="value minutes">0</div>
			<div class="label">Minuten</div>
			<div class="yeardigit">0</div>
		</div>
		<div>
			<div class="value seconds">0</div>
			<div class="label">Sekunden</div>
			<div class="yeardigit">0</div>
		</div>
	</div>
</body>

<script src="https://cdn.jsdelivr.net/npm/fireworks-js@latest/dist/fireworks.js"></script>


<script id="rendered-js">
initFireWorks();
initCountDown();

function initFireWorks() {
  const containers = document.querySelectorAll('.fireworks-container');
  containers.forEach((container, index) => {
    index += 1;
    const fireworks = new Fireworks(container, {
      hue: { min: 0, max: 360 },
      delay: { min: 50 / index, max: 100 / index },
      brightness: { min: 80, max: 100 },
      rocketsPoint: 50,
      opacity: 1,
      speed: 1 / index,
      acceleration: 1.05,
      friction: 0.97,
      gravity: 2,
      particles: 200 / index,
      trace: 4 / index,
      explosion: 40 / index });

    fireworks.start();
  });
}
function initCountDown() {
  const countdown = setInterval(() => {
    const nextYear = new Date().getFullYear() + 1;
    const nextYearDate = new Date(nextYear, 0, 1);
    const diff = countDownDate(nextYearDate);

    Object.keys(diff).forEach(key => {
      document.querySelector("." + key).textContent = diff[key];
    });

    document.querySelectorAll('.yeardigit').forEach((digit, index) => {
      digit.textContent = String(nextYear)[index];
    });
  }, 1);
}

function countDownDate(date_future) {
  const date_now = new Date();
  let seconds = Math.floor((date_future - date_now) / 1000);
  let minutes = Math.floor(seconds / 60);
  let hours = Math.floor(minutes / 60);
  let days = Math.floor(hours / 24);

  hours = hours - days * 24;
  minutes = minutes - days * 24 * 60 - hours * 60;
  seconds = seconds - days * 24 * 60 * 60 - hours * 60 * 60 - minutes * 60;
  return { days, hours, minutes, seconds };
}
//# sourceURL=pen.js
    </script>
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