Fulgur: Pipe & Light Puzzle

Lightning doesn't look for the way out. You build it for it. Every two seconds a discharge leaves the terminal and runs through a network of engraved relays. It follows one mechanical rule, always the same: straight on, else right, else left, else turn back. You get two seconds to rotate a relay, then two seconds of verdict. Nothing to read, nothing to memorise - you understand it by watching the first bolt leave. HOW IT PLAYS Tap a relay to turn it a quarter turn clockwise - like a pipe puzzle, except what flows through the pipes is light, and it has a rule of its own. The bolt will not find the well on its own: it obeys the rule, and the rule is the whole game. Four mechanics bend it without ever breaking it - riveted relays that never turn, one-way chevrons, rotating relays that move on their own at each discharge, and mirrors that swap right and left. WHAT IS IN IT Three hundred…