Explore composable geometry shapes, shaders, transformations with a lisp-like language called Janet. The rendering by compiling the code to glsl, running a raymarching engine (that why it's easy to define composite shapes).

For more (fancy) raymarching demo, check out https://iquilezles.org/articles/raymarchingdf/.

Y combinator wonderfully-explained!

Very interesting insight for the role of parentheses in lisp languages.

If you model a Lisp as a stack language that evaluates from right to left, each parenthesized block must push exactly one value onto the stack, and must not consume any values.