[tuna-f1sh]

Nice. I also have a fondness for flip-dots. Started with Javascript controller for Hanover bus display (https://engineer.john-whittington.co.uk/2017/11/adventures-f...) and continued with the Alfa-Zeta modules following a commission to make the controller for a 256x56 one - 24 panels!

For that I used a Python module (https://github.com/tuna-f1sh/flipdot) and Python Flask/React based manager, with sequence info in a SQLlite db. Same outcome as your App with pre-loaded transitions and of course, Game of Life: https://engineer.john-whittington.co.uk/2020/04/game-of-life...

It's my project TODO list to make a FPGA based direct HDMI controller for the Alfa-Zeta modules since refresh rate of the on-board firmware leaves a little to be desired.