Puzzle Design Stream (Part 1)

(Part 2 is here: https://youtu.be/_k59T9MRdaA)

In which I wrestle with PuzzleScript to implement very simple rules of a puzzle game which is eerily similar to Lights Out. It takes me till about 45:47 to get the mechanic implemented, if you're just interested in watching the actual design. ... https://www.youtube.com/watch?v=WZBb5VyzK-0