Click the green flag, answer as honestly as possible, post who you got, and enjoy! I tried not to add any spoilers for anyone that hasn't yet read HoO. I got Nico! If you have any problems, let me know in the comments. If you get a blank screen at the end, it means you tied. Click "See Inside" then go to "data" and click on the boxes by the variables. You'll see your results.
Info mostly from Percy Jackson and the Olympians. For more information, check out Riordan's Wikia. The song is "Immortals" by Fall Out Boy.
