Random Path Selector + 1 Wide Random Circuit

This is a path selector that works using 3 side-by-side, 1 block wide, random circuits that I've invented.

Clock towers (white) run into monostable circuits (red), which shorten the pulses, and then into a T-flip-flop (dark green) to make the "off" state just as likely as the "on" state. From there they go into a D-flip-flop (orange), which makes the paths only change when the button is pressed.

You can add or take away levels (each level is 4 blocks tall) to the clock towers, so long as there is at least 2 levels. Make the timing for each level unique for maximum randomness. The more levels there are, the more random it is, but also the more often it changes state (sometimes a good thing, sometimes a bad thing). You can counter this by increasing the delay for each level.