W3Schools Tryit Editor

<!DOCTYPE html>
<html>
<title>W3.CSS</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://www.w3schools.com/w3css/5/w3.css">
<style>
.mySlides {display:none;}
</style>
<body>

<div class="w3-container">
  <h2>Animated Slides</h2>
  <p>Slide or fade in an element from the top, bottom, left or right of the screen with the w3-animate-* classes.</p>
</div>

</body>
</html>

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<!DOCTYPE html><html><title>W3.CSS</title><meta name="viewport" content="width=device-width, initial-scale=1"><link rel="stylesheet" href="https://www.w3schools.com/w3css/5/w3.css"><style>.mySlides {display:none;}</style><body>​<div class="w3-container">  <h2>Animated Slides</h2>  <p>Slide or fade in an element from the top, bottom, left or right of the screen with the w3-animate-* classes.</p></div>​<div class="w3-content w3-section" style="max-width:500px">  <img class="mySlides w3-animate-top" src="img_rr_01.jpg" style="width:100%">  <img class="mySlides w3-animate-bottom" src="img_rr_02.jpg" style="width:100%">  <img class="mySlides w3-animate-top" src="img_rr_03.jpg" style="width:100%">  <img class="mySlides w3-animate-bottom" src="img_rr_04.jpg" style="width:100%"></div>​<script>var myIndex = 0;carousel();​function carousel() {  var i;  var x = document.getElementsByClassName("mySlides");  for (i = 0; i < x.length; i++) {    x[i].style.display = "none";    }  myIndex++;  if (myIndex > x.length) {myIndex = 1}      x[myIndex-1].style.display = "block";    setTimeout(carousel, 2500);    }</script>​</body></html>​