I'm trying to create a 1.8.4 UHC map for my server. What I need now is for someone to make a "world border" made out of bedrock. Obviously, it would be too hard in vanilla mc, which is why I need someone who can use worldedit. The center of the border needs to be at exactly x=0,z=0 and I want the border to be exactly square, extending 500 blocks in each direction. The border will also need to start at y=0 and be as tall as y=250. I've attached a picture of what I mean. The square represents bedrock.
Please just respond with another world download of the same map with the completed wall. If someone can do this for me, that would be amazing, and make sure to give me your minecraft name so I can fully credit you for making the wall.