Request for help: better illustrations

The illustrations on https://treenotation.org/ are rough. Particularly the ones with my handwriting.

Anyone want to volunteer to replace one(s) with your own better SVG?

I like these ones:

https://treenotation.org/#helloWorld3D
https://treenotation.org/#complexityCanBeCounted
https://treenotation.org/#aFutureWithoutCompilers

These ones could be much better:

https://treenotation.org/#noSyntaxChars
https://treenotation.org/#createLanguages
https://treenotation.org/#paper
https://treenotation.org/#programWithPictures
https://treenotation.org/#webForms
https://treenotation.org/#cleanData
https://treenotation.org/#programsAreAlsoSpreadsheets
https://treenotation.org/#visualProgramming
https://treenotation.org/#apis