I heard from my dear friend Tiberius Ogden, that you can produce a Patronus? For a bonus point. . . ? Harry raised his wand, looked directly at Umbridge, and imagined her being sacked. Expecto Patronum! The silver stag erupted from the end of his wand and cantered the length of the hall.
You go through different stages when you're working on the music in film. At least, I do. You have a temp score, so you have music from other people, usually from other movies, to give you a sense of what the mood is supposed to be, what the atmosphere is.