Pure Lua 5.2 Script (May work in 5.1, untested)

[BrandonFireflower]

Also, looking at code will help new/intermediate scripters/programmers understand the concepts and syntax of the language.

That may be so, but that code is a heckuva lot more complicated than any I've ever used or seen used in Buildism, even by the creator. I may have seen some code that was that advanced in a few Roblox scripts, but we'd be talking 5,000 lines made by the finest, and definitely not the kind of thing your average builder would be using.

The only complicated part is the metatables. o.e
If you've not seen any Lua code this complicated, you don't want to see what I used it for...