You can edit / change the code and click run button
<!DOCTYPE html> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/> <style> h1 {font-size: 50pt;} h2 {font-size: 25pt;} p { font-size: 15pt; line-height: 25pt; } </style> <script>var clicky_site_ids = clicky_site_ids || []; clicky_site_ids.push(101319977);</script><script async src="//static.getclicky.com/js"></script></head> <body> <h1>Good Morning</h1> <h2>Good Afternoon</h2> <p>CSS Units.</p> <p>SnoopCode</p> </body> </html>