Anyone know how to make this resource pack work?

I found a resource pack that used durability of armor to change the texture, but it was netherite so i changed it to diamond. It is in optifine/cit/armor/stage1 or 2 or 3 or 4, and properties pretty mush just look like this:
items = minecraft:diamond_boots
damage = 75-100%
texture.diamond_layer_1=dura_layer1

dura_layer_1 and 2 are just the diamond armor textures, but i changed the colors.
Currently, it doesnt work, and i am using optifine. Once we figure out how to fix this, I also want to know how to make it non optifine.