ATTENTION, FOR LESS LAG (and a higher quality project) USE TURBOWARP: https://turbowarp.org/642464485?hqpen&fps=60&clones=Infinity AI in my 3D Engine. No pathfinding though as I've never really done that. So, pico's kinda stupid because of that. If you get behind a wall, he can't get you. Though, he does follow you.
It's AI, that's it. Engine: https://scratch.mit.edu/projects/641131882 (it's also made by me!) @griffpatch for 3D Engine. @skyhigh173 for breathing effect