From the challenge details: Dimi has struck gold again, how about a Silent Night rainbow? It's roughly 30 seconds long per section and lends itself to creating a wonderful rainbow of moods. I've knocked up a quick demo in C, but the sky is the limit :) All entries in before 10th December to give chance to mix them into a wonderful rainbow :) Please post them here: This is a free for all, there's no colours to interpret, j More