The Ziggurat, Tower 7 of 25

Tower 7 of 25 · The Ziggurat · Old Town · standard wiring
switches 0 · par 3
Three switches are enough, and only one set of three works.

A bright frame marks a flipped switch. Flip it again to take it back; your browser's Back button undoes a move too.

This picture as a command file · How it works