Stare at the center, and just focus on the throbbing and the colors. After a while, it will start looking interesting and weird.....you will start feeling sleepy, and when you finally look away...your eyes will feel sleepy and strange ( ^ - < ) N o t e - I understand that it may not work for you, but don't just write a comment saying 'your project's broken, it's not working', or something like that.
Picture from Deviantart.com