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> p:first-child { background-color: red; } </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> <p>This is first child of its parent (body).</p> <h1> Homepage</h1> <p>This is not the first child of its parent.</p> <div> <p>This is the first child of its parent (div).</p> <p>This is not the first child of its parent.</p> </div> </body> </html>