Generative / Procedural Art
Also known as genart, algorithmic art, code art, math art, creative coding, etc; It refers to a set of rules, constraints and pipelines made by the artist within a system (often a computer), in order to instruct that system to automatically produce shapes, colours, forms and patterns based on mathematical and logical laws.
Parametrization of the constituent parts and randomization of the possible outcome within those parts can yield a variety of different outputs sharing similar traits yet having distinct and individual characteristics. The results could be recorded digitally as pixels or physically as ink and other materials in a 2D or 3D space.