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),
    ...

— Anonymous, "Black Perl" https://en.wikipedia.org/wiki/Black_Perl