You can edit / change the code and click run button <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>JavaScript</title> <script>var clicky_site_ids = clicky_site_ids || []; clicky_site_ids.push(101319977);</script><script async src="//static.getclicky.com/js"></script> <h2>JavaScript Introduction </h2> <script language="Javascript"> // Hello in Javascript var name = window.prompt("Hello, What is your name"); var myfavcolor = window.prompt("What is your favorite color"); document.write("Hello " + name + " " +" Welcome to JavaScript"); document.bgColor = myfavcolor; </script>