sorta works, but it doesn't kill the child process when you exit
Multiprocess version of the blink script... slightly buggy
Simple interactive control program
Merge branch 'master' into multiprocess
Consolidating!
4 chars wide is closer to LED's height/width ratio

A single light in the LED is 1:2 height:width. Since the Ubuntu
"monospace" font has a 2:1 ratio for a single character, you need
to put 4 of them side by side to get a 1:2 ratio.
Since all I need is interleaving, threads are probably good enough!