[MWForum]curious language

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Thanks Everyone,
I also just learned that Logo programs can call themselves, Seymour Papert just
gave me this program and now I'm trying to understand it.
to el :x :n
ifelse :n = 0 [fd :x]
repeat 4 [ el :x / 3 (:n-1) rt 90]]
end
It doesn't do what I want it to, but to me this is intriguing because coming
from C a program can't call itself. I'v been trying to figure what's going on.
The program draws a square and then fills it up with four more squares, if you
input :n as 2. How does the program stop.
Jim Bonnes