A micro-artworld that is a simple and almost entirely incorrect model of the real one. You can get the original Common Lisp source code here, the Python version here, or the node.js version (in progress) here.
The critic reads those posts and critiques them, offering an opinion on their worth. They also explain how their aesthetics change over time. They’ll be back soon.
The collector buys those artworks that the critic hails as masterpieces. They’ll be back soon.