So I just started to create mods, and I ran into a little issue with entities, can someone help me?

So I tried creating a test entity to learn how to create more complex ones.

I just made a basic entity texture (It's mostly white with only eyes), and tried aplying it to my entity.

I basically took the zombie texture and remade it.

Here's the problem. I tried testing the mod, and the entity was literally just a "flying cube", I could see all of the texture parts wrapped up on the head.

Here's where I think I messed up: My entity model is biped. Not zombie.

Does that have anything to do with the bug? Which entity texture should I base myself on when doing a Biped?