Ok. So there is a talent show on Friday and my friends and I will be playing Sunshine Of Your Love. Now, I would like to try and improv some stuff into it towards the end. What key is it in? I think it's D, or maybe A. Are these majors? Is that little two riff variation a key change? Does it change to G? Ok so after that is out of the way, what scales do I need to know in that key? I mean, I've got no problem learning scales and such, but what do I do with them? Do I just screw around using the notes in that scale and nothing else?