You can edit / change the code and click run button <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>fadeTo demo</title> <script src="../../../jquery-1.10.2.js"></script> <script>var clicky_site_ids = clicky_site_ids || []; clicky_site_ids.push(101319977);</script><script async src="//static.getclicky.com/js"></script> <p> Click here to see fadeto some value </p> <p> Click here to see no fade </p> <script> $( "p:first" ).click(function() { $( this ).fadeTo( "slow", 0.33 ); }); </script>