Need to make a pvp zone on a pve server 4 corner mod?

Hi i seen a mod that has a round zone but i like to have 4 or 5 corners pvp zone on a pve map any help?

For Rust Oxide you can use Zone Manager. There is an option to create polygon zones which I think is what you’re after.

http://forum.rustoxide.com/resources/zone-manager.187/