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▌▒▒▀▄▄▄▄▄▄▀▒▒▒▒▒▒▒░▒░▒░▒▒▒▌ Very Factory Description Language
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▀▄▒▒▒▒▒▒▒▒▒▒▒▒▒░▒░▒▄▒▒▒▒▌ Very Factory
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VFDL (is going to be) the equivalent of a hardware description language like VHDL for factorio. You define your factory in a very VHDL-esque format, compile it using vfdlc (this repo!) and get out a blueprint (book?) of that factory that you can paste.
Because I can. And because I never ever want to ever have to build a 120:64 balancer by hand again. And because I want to automate signal logic away (TODO). And because I want to be able to compile MIDI to programmable speaker (TODO).
Do you mean "how"? In that case: magic. Pure, raw, unadultered, black magic.
It doesn't work yet. It may in the future. But it doesn't at the moment.