The circle one might be surprisingly useful at some point for me.
I was thinking of making shit on a graph like that before actually building it but I'm always too busy.
You can repeat it in the same method with any size, as long as you use the same 1-2-3-4-5-4-3-2-1 side length method.
We had a power outage on Friday, so I was stuck in PROGRAMMING class for 2 hours. Luckily, I'm OCD and carry a stack of graph paper in my binder at all times.