the voices from te background will whisper a sequence of items to you if you listen closely enough. its randomized each time but it will go along the lines of hands, spiders, trees or spiders, eyes, candles. you just have to fine how many of each type was stained red.
for example the spider had eight legs that were all stained red.
the hands had 9 fingers stained red and the tree had 4 roots stained red.
so if the voice whispered, spider, hand, tree,
the code would be 894