It's a fun article and this really doesn't matter much but `5{|+\x}\1,2` does not give the typical fibonacci sequence. Either `5{|+\x}\1,1` or `5{|+\x}\2,1` do, if the results from this random online interpreter can be believed (https://ngn.codeberg.page/k/#eJwzra7RjqmojTHUMQQAFyUDkw==).