help finding song

it's a song with a piano, you can play it here:

Flash Piano - The Method Behind the Music

enter:

d d d d f f f f f g d d d d s s s s

That's in the beginning of the song.

In the middle, it's like 'nobody knows it's a secret'

please help!

Need more info. What genre is this song? What is the tempo? fast, moderate, or slow? Also, you you say to enter d,f,g,d, then s, but what the heck is s?? Which letters are you refering to, the bottom ones (Actual notes) or the middle top ones (they coincide with the keys on your computer keyboard)?? How old is this song?