The displays in this piece were a real find!  These extra large nixie tubes were removed from the Pacific Stock Exchange in the 70's.  The local electronic surplus stores sold them to hobbyists who then made clocks out of them.  They were all gone by the 90's, but one store in Berkeley (near where I lived at the time) came across some in their back room and called me knowing that I used numeric displays in my work.

I programmed this piece to choose one tube then cycle rapidly through random numbers, then stop.  After a pause of up to 5 seconds another tube will cycle random number values and stop, showing a changed value.