Randomized Grass Texture

Hi! I don't even know if this feature is entirely possible on McCreator (or how to do it if it is). I'm very much an artist and not super savvy with coding, etc... so any help is highly appreciated. I'm trying to make my grass (block) texture randomized in a texture pack, and I'm not entirely sure how to do so. I was directed here to get help, and all the tutorials I've found for randomized textures either don't work for the more complex nature of the grass block, or are simply outdated. If there's a way to make the grass texture randomized whether it be on this program or simply in the notepad file I'm dying to know! Thank you all so much in advance.