<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<style>
* {box-sizing: border-box;}
body {font-family: Verdana, sans-serif;}
.mySlides {display: none;}
img {vertical-align: middle;}

/* Slideshow container */
.slideshow-container {
  max-width: 1000px;
  position: relative;
  margin: auto;
}

/* Caption text */
.text {
  color: #f2f2f2;
  font-size: 15px;
  padding: 8px 12px;
  position: absolute;
  bottom: 8px;
  width: 100%;
  text-align: center;
}

/* Number text (1/3 etc) */
.numbertext {
  color: #f2f2f2;
  font-size: 12px;
  padding: 8px 12px;
  position: absolute;
  top: 0;
}

/* The dots/bullets/indicators */
.dot {
  height: 15px;
  width: 15px;
  margin: 0 2px;
  background-color: #bbb;
  border-radius: 50%;
  display: inline-block;
  transition: background-color 0.6s ease;
}

.active {
  background-color: #717171;
}

/* Fading animation */
.fade {
  animation-name: fade;
  animation-duration: 1.5s;
}

@keyframes fade {
  from {opacity: .4} 
  to {opacity: 1}
}

/* On smaller screens, decrease text size */
@media only screen and (max-width: 300px) {
  .text {font-size: 11px}
}
</style>
</head>
<body>

<h2>Automatic Slideshow</h2>
<p>Change image every 2 seconds:</p>

<div class="slideshow-container">

<div class="mySlides fade">
  <div class="numbertext">1 / 3</div>
  <img src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiUBwasm53rzCD8WiBsvlY96LXfkg4ZCw6mhRtSsJ9i6bRIr5buz3pp5x-W9u1Cf6ffhCzFBk4tQDOyQUKjsVyHC2Fi2bwtAY7OIXxnyVb4zcU_gc_EL3pjeb5eZk5VMwkzZELxTYIJikGV3gfvIKXGg88aJn_DOXMxsLUts_mQxRof1RJ192X0zJvO5mE/w640-h470/construction-workers-queuing-to-get-on-bus-to-living-quarters-at-end-EGRAJE.jpg" style="width:100%">
  <div class="text">Caption Text</div>
</div>

<div class="mySlides fade">
  <div class="numbertext">2 / 3</div>
  <img src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjDiRG4cev_Px4X3PNET2WUxldmyKwcQdvHJN8aoooacyAFXQ8t0dF0Yx9_DVJmJSdNKpb9LkEtYk4MkG647IMisu6nj2nSpuxWmUOqEvKsirNAiIjUxqD_dG5KpJMIl2Rh4ymP-QyX9h0PCwdXwNXYV2BWL8fqr-zhYlpvAp64lBTfePmHV8k5eICvX2s/w640-h388/gamca%20spot.png" style="width:100%">
  <div class="text">Caption Two</div>
</div>

<div class="mySlides fade">
  <div class="numbertext">3 / 3</div>
  <img src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjg3htkZYe2btT0jiLJHqNMSVUhYrr9Wa6RDri2WiqBYk5TE7c0ZdVU1kmdj8WP0NZTv2y9-cfDwPicTyQfsDUKoxzno1ZICjli6kQ9wqY3n35tGOrceIQKHvmKSbi54tShLvQyn4H0J-o19DY2YRcfd_S9gqRo12OAKZvJidNodivsCBOtZ-dT0dRe6i4/w640-h432/19.jpg" style="width:100%">
  <div class="text">Caption Three</div>
</div>

</div>
<br>

<div style="text-align:center">
  <span class="dot"></span> 
  <span class="dot"></span> 
  <span class="dot"></span> 
</div>

<script>
let slideIndex = 0;
showSlides();

function showSlides() {
  let i;
  let slides = document.getElementsByClassName("mySlides");
  let dots = document.getElementsByClassName("dot");
  for (i = 0; i < slides.length; i++) {
    slides[i].style.display = "none";  
  }
  slideIndex++;
  if (slideIndex > slides.length) {slideIndex = 1}    
  for (i = 0; i < dots.length; i++) {
    dots[i].className = dots[i].className.replace(" active", "");
  }
  slides[slideIndex-1].style.display = "block";  
  dots[slideIndex-1].className += " active";
  setTimeout(showSlides, 2000); // Change image every 2 seconds
}
</script>

</body>
</html> 

Automatic Slideshow

Change image every 2 seconds:

1 / 3
Caption Text
2 / 3
Caption Two
3 / 3
Caption Three