Image enhancer

I made something I always thought about making that was a type of code that would copy pixels of an image and multiply them to essentially have a “higher resolution image”. This was my first project of coding something original that I made so it was pretty hard to know what to do next and how to implement things, so I did use AI to give me steps and tell me how to fix some problems, still I didn’t use it to write any part of my code. Even though this version of my project is complete, I do plan to make new versions to make it better since in some parts it is pretty confusing. Stil if you show interest in my journey I would appriciate tips of what I cat improve on. (Picture on the left is the original photo of my cat’s eye. Right picture is the same picture after the enhancer)