I was looking for an interesting block to play with offset when I came across Spool. My first thought was, this is not an interesting block and no matter how I color it or offset it, it will never be interesting. I decided to give it a try more out of a sense of fairness and duty than from any expectation that anything would come from it.
Here's what I found.
I was wrong when I thought Spool had no potential to be interesting.