need advice form Guru - traffic light app (Ernst M. Reicher)

[opus.species at wanadoo.fr]

> I want to make an application which shoes something like traffic lights 
> in a small window on 5 computers in a network.

There is a easy (leasy) way to perform your goal if your 5 computers can 
access a shared folder.
Let each computer update periodically in the shared folder in small text 
file what contains the ticks and the color of the computer.
Reading the file of the other computers, each computer can know if the 
other are working or not and their color.

Claude Lemmel