Black Perl

One of the first examples of Perl Poetry. It's featured in the Camel Book. Here it is:

BEFOREHAND: close door, each window & exit;
  wait until time.
    open spellbook, study, read (scan, select, tell us);
write it, print the hex while each watches,
    reverse its length, write again;
    kill spiders, pop them, chop, split, kill them.
       unlink arms, shift, wait & listen (listening, wait),
sort the flock (then, warn the "goats" & kill the "sheep");
    kill them, dump qualms, shift moralities,
    values aside, each one;
        die sheep! die to reverse the system
        you accept (reject, respect);
next step,
    kill the next sacrifice, each sacrifice,
    wait, redo ritual until "all the spirits are pleased";
    do it ("as they say").
do it(*everyone***must***participate***in***forbidden**s*e*x*).
return last victim; package body;
    exit crypt (time, times & "half a time") & close it,
    select (quickly) & warn your next victim;
AFTERWORDS: tell nobody.
    wait, wait until time;
    wait until next year, next decade;
        sleep, sleep, die yourself,
        die at last

It should be noted that Black Perl poem no longer parses with Perl 5; It was originally written for Perl 3. Larry Wall was particularly happy about that fact. The message displayed in the Camel Book only says the creator "wishes to remain anonymous".

The poem parsed in Perl 3 but it didn't appear to do anything useful, though ("exit" on the first line is probably the reason for that).