Personally, I think there should be sandstone walls or brick walls to. I just think It’ll be a nice addition in general.
To make sandstone you get some sand in a bowl and mix it with water and put it in the brick mold to dry. It’s the same way you can make brick tile if you want to make sandstone ones. Then you can get it out with the wheel barrow and put the sandstone on the stakes. Same way you wanna make brick walls to.