Hey guys, I need a little help. I've had a creativity block with an effect for a VERY long time, presentation vise. The effect is "Duplicity" by John Bannon, which I perform purely as a piece of mentalism (destiny or choice influence, what would have been if... etc). Although it is meant to be a magic trick. Anyways, the effect uses the 4 Aces, which I HATE, since I'm not presenting it as a magic trick, so why use Aces? So I need something that there is 4 of, and it splits into two categories. There are 4 aces, and they split into red and black Aces. So what else is there that there are 4 of, in 2 categories? Or something close to that... I was thinking about using 4 colors, and split them into warm and cold colors (red and yellow are warm, and blue and green are cold). Any other suggestions?