I remember a long time ago reading about this old test on thought process or something, one of the questions was something about a gradient colored arrow on a road and choosing which side of the road a house would go on or something? It's been years since I read about it but my friend was talking to me about this kind of thing and I thought he'd be interested in it. Does this ring a bell to anyone? I'm sorry if my description is kind of vague but I can hardly remember anything about it.