Beveled Ring(Scad Code Reference)

It's hard to find Scad files using purely dynamic methods. While lacking complexity, this file is intended to be an example of a ring with beveled edges to show how the code adjusts based on given parameters.
Things to note:
The first transformation under the module "ring" transforms the whole thing, so while the ring is centered, one end is still considered the origin.
Module "ring" is the base while "ringbeveled" has the refined inside edges.
The 2d profile created by "square" is rotated. This can be changed into circle to create a donut.
The 2d profile is first cut using "difference" to subtract the two squares rotated to 45 deg, then rotated, not rotated then cut.