contextfree binary package in Ubuntu Xenial arm64

 Context Free is a program that produces images based on context-free grammars.
 These grammars are sets of non-deterministic rules that determine what an
 image should look like. The resulting images often resemble a mix of
 spirograph drawings, fractals and abstract art.
 .
 Context Free can generate images with millions of shapes, in PNG (up to 100
 megapixels) or SVG format. It can also produce animations. Many example
 images are included.

Source package