This is sort of a tech demo on how you can make a working cameras in Scratch, that's why there's no GUI or anything. Just follow the prompts and you'll be fine. The camera is incredibly slow, but there's nothing that can be done about that. Savecode are working, but they WILL NOT fit in comments.
Apart from the below mentioned, all code and assets are mine. Thank you so much to @frodewin for the color detection script (https://scratch.mit.edu/projects/13412067/), I would not have found it otherwise, and it's part of what inspired this project. Stole it from @griffpatch 's flood fill project. I got the idea to use an extremally small scanner for all sizes from @-Jie- 's similar camera project (https://scratch.mit.edu/projects/18657617).