Using Task Manager's CPU core load display gets you a 9x14 (126 pixels) wall, as the last two don't divide evenly so are left off. I'll link to the TomsHardware article on it which has a link to the full video. They used the video "Bad Apple", which is a black and white anime of sorts.
I wonder what would happen if you used 4 64C/128T EPYC Rome CPUs, 512 threads, 20x25, much higher definition than 9x14 
https://www.tomshardware.com/news/watch-amd-threadripper-3990x-128-threads-render-video-task-manager
