CodeLab
Tutorials For Everyone
Run
<!Doctype html> <html> <head> <title>HTML Head</title> </head> <body> <h1>Google</h1> <!--level 1--> <h2>Youtube</h2> <!--level 2--> <h3>Faceook</h3> <!--level 3--> <h4>Baidu</h4> <!--level 4--> <h5>Twitter</h5> <!--level 5--> <h6>Instagram</h6> <!--level 6--> </body> </html>