[HELP] Can't make an item cycle between textures (item animation)

Hello, I've been trying lately to make an item that cycles its texture (for example making a glint that moves on a diamond). The thing is that I made the corresponding animated texture using the 'create animated texture' feature but instead of cycling between textures, I just get the compressed form of the sprite sheet. I tried also using item states but I didn't find any kind of 'wait x ticks' condition to make the cycling texture.

 Has someone already made this work? I dont know if there's any plugin that makes this posible to do. If someone could help me it would be grat, I've been hours searching and I'm loosing my mind.