Sun/Moon Texture Change

I have a procedure that detects when the moon is full. with a 30% chance the blood moon rises.

I find many old posts that tell you that you can use optifine to change certain textures. but no one explains anything specific

Is it possible when BloodMoonState = 1 that the texture of the moon changes?

Does anyone have a tutorial link or a screenshot for such a procedure with optifine

Thank u in advance :)