I have made 4k intro samples using Nim programming language. https://github.com/demotomohiro/nim-4k-intro-sample
I have wrote a blog post about how to make 4k intro with Nim. English: https://internet-of-tomohiro.netlify.app/nim/nim4k.en.html 日本語: https://internet-of-tomohiro.netlify.app/nim/nim4k.ja.html