I test my 7-segment display controller logic. (Map)
This is long, so you might want to watch it at a high speed.
There are some issues involving segments sticking when I change multiple input bits in a short period of time, probably because the water level on their pressure plate fluctuated, making that plate send a message to the bridge, then corrected itself before the bridge had changed, causing the second message to be ignored.
I first tried to correct this by changing the input to something I knew would clear the stuck segment and then back, then discovered that shutting off the water flow through the system and turning it back on would reset things more quickly.