There is no official release of the sheet music for the sequence, but you can get May the Force be With You which is like a concert arrangement of the force theme. You could note match the sequence by ear or with a keyboard (which is in the same key as flute) and just write it down. Unless you have taken a music theory class or such and can do it by ear, i think you best bet is to do it on keyboard to match the pitches, rhythems, and chords.