Carpet item texture

Hi, I'm creating a carpet item and I don't really understand how to make it a normal texture. I made a custom block, and it has normal block texture, but a carpet looks weird in inventory as well as dropped item. For the carpet I used a custom 16x1x16 model with a texture on top. Pls help...

Here's a look of a vanilla carpet and the one I made https://imgur.com/a/iadCLp4