Funciton

[timwi]

╓──────╖
║ Fibo ║
╙──┬───╜
┌─────────┴─────────┐
│ ┌───────┴──────┐
┌─┴─╖ ┌───╖ │ ┌───╖ ╔═══╗ │
┌─┤ · ╟───┤ + ╟─┴─┤ + ╟──╢ 1 ║ │
│ ╘═╤═╝ ╘═╤═╝ ╘═╤═╝ ╚═══╝ │
│ │ ┌────┴─╖ ┌───┴──╖ │
│ │ │ Fibo ║ │ Fibo ║ ┌─────┴───┐
│ │ ╘════╤═╝ ╘═╤════╝ │ ┌──┴──┐
│ └┐ │ ┌─┴─╖ ┌─┴─╖ ┌─┴─╖ │
╔═╧═╗ └┐ │ │ − ╟──┤ ? ╟──┤ ≤ ║ │
║ 2 ║ └┐ │ ╘═╤═╝ ╘═╤═╝ ╘═╤═╝ │
╚═╤═╝ └┐ └─────┘ │ ╔═╧═╗ │
│ ┌───╖ │ ┌───╖ ╔════╗ │ ║ 0 ║ │
└─┤ − ╟─┴─┤ + ╟──╢ -1 ║ │ ╚═══╝ │
╘═╤═╝ ╘═╤═╝ ╚════╝ │ │
┌────┴─╖ ┌───┴──╖ │ │
│ Fibo ║ │ Fibo ║ │ │
╘════╤═╝ ╘═╤════╝ │ │
│ ┌─┴─╖ ┌─┴─╖ ┌─┴─╖
│ │ + ╟──────────┤ ? ╟────────┤ > ║
│ ╘═╤═╝ ╘═╤═╝ ╘═╤═╝
└─────┘ │ ╔═╧═╗
║ 2 ║
╚═══╝
I invented my first esoteric programming language.

It is called Funciton (pronounced: /ˈfʌŋkɪtɒn/).

I posted it to esolangs.org.

The Fibonacci function is shown on the right. None of the functions you see in there (+, >, etc.) are built-in; all of them have an implementation in Funciton. See the article for these declarations.

I need to stop doing useless things like this and get back to real work.