OK, so this is going to be a massively n00by post, but there's steam blowing out of my ears here! I'm pretty much a novice to music theory. I learned the major scale, natural minor, harmonic minor and melodic minor as the "TTsTTTs" thing, and these modes make absolutely no sense to me. I understand how you form them and how they're made, I just don't actually get what they're for. When you write a song in a particular mode, what drives you to write the song in that mode? Also, and this is a broad question (for which I apologise sincerely, it's not fun being a scrub at these things), HOW do you "write a song in X mode"? I want to get into writing music, but I quite literally have no idea what I'm doing. I have some riffs written on lined paper blu-tacked to my bedroom wall that fit into keys only because the notes happened to all be in the keys' scales, but that's as far as I've got. Will someone be my saviour and tell me what the dicks I'm meant to be doing?!