First off, thank you sharing your diagrams and code it really helped me learn programming and electronics tips for my new hobby. I thought you would like to know that while trying out your shift register example and playing around with it, I could not get custom bit patterns to light up. Only one pattern seemed to work no matter which bits were sent over to the register. That was until I switch the "latch/clock" pins as described in your wiring diagram. No rush, and thank you for sharing your examples!