With the Book of Secrets equipped on the librarian, go to the Strange Monument and enter the following codes on the totems. Letters and numbers can be typed on your keyboard, they do not have to be clicked. The flute is mapped to the space bar. Hold the flute for at least 1 second for a long note, click it for a short note. The eyes correspond to arrows, but must be clicked.

Code	Effect
Gold Skull 1	(Using the eyes) Up Up Down Down Left Right Left Right BA
Gold Skull 2	112358132134
Gold Skull 3	4815162342
Gold Skull 4	thisisntacode
Gold Skull 5	cidwashere
Gold Skull 6	bloodfruit
Gold Skull 7	cactuar
Gold Skull 8	theysaythatcateztlitenochisonebadmothashutyourmouthbutimtalkinabouteztlitenochthenwecandigit
Gold Skull 9	(Flute) long x2, short, long x6, short x2,long x2, short x5, long, short x3
Unobtanium Skull 1	8675309
Unobtanium Skull 2	(Flute) short x2, long, short x2, long x2, short x2, long, short x3, long, short x3, long, short x2, long, short x3, long, short, long, short x4, long