Plan 9 from Bell Labs’s /usr/web/sources/contrib/fgb/root/sys/src/cmd/4th/examples/fractals.4th

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Distributed under the MIT License.
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\ Copyright (C) 2002, 2003 Volker Poplawski <volker@poplawski.de>
\                          Stefan Reinauer
\ This example even fits in a signature ;-)

include lib/pickroll.4th

[hex] 4666 dup negate
do
    i 4000 dup 2* negate
    do
        2a 0 dup 2dup 1e 0
    do
        2swap * d rshift 4 pick +
        -rot - j +
        dup dup * e rshift rot
        dup dup * e rshift rot
        swap
        2dup + 10000 > if
            drop 2drop 2drop 20 0 dup 2dup leave
        then
    loop
    2drop 2drop
    emit
    268 +loop
    cr drop
5de +loop


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