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HTML 

              
                  <div class="slider">
    <img
      id="img-1"
      src="https://images.bannerbear.com/direct/EjJywNMlJm5zmerB8a/requests/000/033/000/213/0Mn5r3E1XY0gmWDZQWPoD9kg7/9e42168a169264bb575a5ec10acd1c8942967845.jpg"
      alt="Image 1"
    />
    <img
      id="img-2"
      src="https://images.bannerbear.com/direct/EjJywNMlJm5zmerB8a/requests/000/033/000/213/0Mn5r3E1XY0gmWDZQWPoD9kg7/9e42168a169264bb575a5ec10acd1c8942967845.jpg"
      alt="Image 2"
    />
    <img
      id="img-3"
      src="https://images.bannerbear.com/direct/EjJywNMlJm5zmerB8a/requests/000/033/000/213/0Mn5r3E1XY0gmWDZQWPoD9kg7/9e42168a169264bb575a5ec10acd1c8942967845.jpg"
      alt="Image 3"
    />
  </div>
  <div class="navigation-button">
    <span class="dot active" onclick="changeSlide(0)"></span>
    <span class="dot" onclick="changeSlide(1)"></span>
    <span class="dot" onclick="changeSlide(2)"></span>
  </div>
!

CSS 

              
                  .slider {
    width: 100%;
    height: 510px;
    position: relative;
  }

  .slider img {
    width: 100%;
    height: 500px;
    position: absolute;
    top: 0;
    left: 0;
    /* transition: all 0.5s ease-in-out; */
  }

  .slider img:first-child {
    z-index: 1;
  }

  .slider img:nth-child(2) {
    z-index: 0;
  }

  .navigation-button {
    text-align: center;
    position: relative;
  }

  .dot {
    cursor: pointer;
    height: 15px;
    width: 15px;
    margin: 0 2px;
    background-color: #bbb;
    border-radius: 50%;
    display: inline-block;
  }

  .active,
  .dot:hover {
    background-color: #717171;
  }
!

JS 

              
                  var currentImg = 0;
  var imgs = document.querySelectorAll('.slider img');
  let dots = document.querySelectorAll('.dot');
  var interval = 3000;

  // Second banner
  var secondEventTitle = 'Hi! *Freshmen* Orientation Day';

  // Third banner
  var thirdEventDate = new Date('2023-02-01'); // pull this from database
  var thirdEventDateString = thirdEventDate.toLocaleDateString('en-us', { year: 'numeric', month: 'short', day: 'numeric' });
  var days = calculateDays(new Date(), thirdEventDate) || 0;
  const countdownText = days > 0 ? `${days} days left` : 'Live Now!';

  var secondImageUrl = `https://ondemand.bannerbear.com/simpleurl/01YWAxB7nGYdJrKoXM/title/text/${encodeURIComponent(secondEventTitle)}`;
  var thirdImageUrl = `https://ondemand.bannerbear.com/simpleurl/ley9O0B2ZGbB4GjRDY/date/text/${encodeURIComponent(
    thirdEventDateString
  )}/countdown/text/${encodeURIComponent(countdownText)}`;

  document.getElementById('img-2').src = secondImageUrl;
  document.getElementById('img-3').src = thirdImageUrl;

  var timer = setInterval(changeSlide, interval);

  function changeSlide(n) {
    for (var i = 0; i < imgs.length; i++) {
      imgs[i].style.opacity = 0;
      dots[i].className = dots[i].className.replace(' active', '');
    }

    currentImg = (currentImg + 1) % imgs.length;

    if (n != undefined) {
      clearInterval(timer);
      timer = setInterval(changeSlide, interval);
      currentImg = n;
    }

    imgs[currentImg].style.opacity = 1;
    dots[currentImg].className += ' active';
  }

  function calculateDays(today, eventDate) {
    const difference = eventDate.getTime() - today.getTime();

    return Math.ceil(difference / (1000 * 3600 * 24)); // convert to days
  }
!
999px

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