It reminded me of these old Unix lessons of Master Foo https://prirai.github.io/books/unix-koans/#master-foo-discourses-on-the-graphical-user-interface https:/

It reminded me of these old Unix lessons of Master Foo https://prirai.github.io/books/unix-koans/#master-foo-discourses-on-the-graphical-user-interface https://prirai.github.io/books/unix-koans/#master-foo-discou...