here's a separate topic.

imagine you are in some forsaken third world country and you are tossed in jail. so you're alone in some stinking, rotting jail cell. and the only way to communicate with the other prisoners - is to tap out a message through the walls.

how exactly do you do this? I don't think many people know Morse Code any more. so what do you do - go back to
one-tap = A
two-taps = B
etc.
it's pretty inefficient.

I wonder if there is some creative way to do this??

Pete2