information transfer through the railway station

[Guu]

this is an old trick, and here on the forum there are already several similar schemes.
so there’s nothing new, it’s just decided a little differently than the others. The video contains explanations of the basic principles. so whoever understands this will be able to build such a thing, and even better. since I do not understand programming

https://youtu.be/yiSUo_8czAE

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