This is quite famous, but I'm betting that not *everyone* knows about this website, and that would be a shame.
507 Mechanical movements is a steampunk npm, containing virtually every concievable thing that is possible with gears and levers
and now it's animated for the internet.
(vi - Moria: “Like Fangorn, ancient and deep, with hints of the long labor of a great people... A shaft of light illuminates some runes! They read as follows:
The Wizard translates: ‘We cannot get out! We cannot get out!’”)