Shader Utils plugin crashes my game.

I made this code and was wondering whether there was any issues because whenever i open a world while the mod that contains that code is active i just freeze and then crash.

https://www.dropbox.com/scl/fi/y673yvxa7b4uy3d5lwl21/Screenshot-2025-02-18-at-09.32.53.png?rlkey=cw3n6n2ndiif21w1cz8y1u50w&st=37rzio2i&dl=0

(attached a dropbox link cos i can figure out how to do screenshots)