2D items

On Minecraft, you can add the old way Minecraft used to render blocks by making model that only has a front and back. I'm not very knowledgeable on this kind of stuff so this method works, please send the model text. Help would be appreciated!

Example of what I am trying to achieve: www.youtube.com/watch?v=a1FGguGU_rc&feature=emb_imp_woyt&ab_channel=YasserToumi