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<!DOCTYPE html> <html> <title>W3.JS</title> <link rel="stylesheet" href="../w3css/4/w3.css"> <script src="../lib/w3.js"></script> <body class="w3-container"> <h2>Testing W3.JS with CSS</h2> <p>Elements with a class="city" will behave like a slideshow:</p> <h1 class="city">London</h1> <h1 class="city">Paris</h1> <h1 class="city">Tokyo</h1> <script> w3.slideshow(".city"); </script> </body> </html>