here is the source for a working plan 9 version:

fun to watch.

On Sat, Feb 22, 2020, 1:02 AM Dave Horsfall <> wrote:
On Sat, 22 Feb 2020, Warren Toomey wrote:


Sheer genius in its simplicity of implementation!  For some reason I am
reminded of "xroach": I used to surprise my cow-orkers with it...

-- Dave