I was working on a rotating door puzzle lock for a redstone challenge, and while experimenting with a circuit, I found out the smallest variation of it was 5x1x5, and stackable. I had been building a tower to get rid of the abundance of various stone blocks cluttering my chests, and decided making the mechanism into a 5x3x5 configuration and running the pulses into redstone lamps created a very impressive upward rotating motion. The lamps appear to be truly rotating, as if a giant upward tilted light was spinning inside. It's look pretty nice atop the Insanity Island my realm is doing for our discord server. You can also see my house (mountain top) my friend's castle by the see, and my wife's little stilt house nested into the valley of the islands.