Can anyone recommend a "sound simulation" website for the Dec 4th puzzle? My keypad has the same tone with all buttons. I sorta figured out the example tune based on it's rhythm but having trouble placing the 2nd tune with my keypad. That would be because the second tune is not a tune but...

I can't figure out how to make a 'spoiler button' post. Walk me thru it? Above your text box are a couple of buttons, the last of which says "spoiler". If you click it, it inserts this text: Your spoiler-text needs to go in the middle between the two brackets. I recommend checking if it w...

When you turn the book upside down, ...

and here comes a big spoiler:

My mistake was to think the pointy cogs have to point at something.