return function(center, surface) --random walls
    local ce = surface.create_entity --save typing
    local fN = game.forces.neutral
    local direct = defines.direction
    ce{name = "wooden-chest", position = {center.x, center.y}, force = fN}.insert{name = "piercing-rounds-magazine", count = math.random(1, 300)}
    ce{name = "stone-wall", position = {center.x-2.5, center.y-0.5}, force = fN}
    ce{name = "stone-wall", position = {center.x-2.5, center.y + 1.5}, force = fN}
    ce{name = "stone-wall", position = {center.x-2.5, center.y + 2.5}, force = fN}
    ce{name = "stone-wall", position = {center.x + 2.5, center.y-0.5}, force = fN}
    ce{name = "stone-wall", position = {center.x + 2.5, center.y + 0.5}, force = fN}.damage(22,"neutral","physical")
    ce{name = "stone-wall", position = {center.x + 2.5, center.y + 1.5}, force = fN}.damage(46,"neutral","physical")
    ce{name = "stone-wall", position = {center.x + 2.5, center.y + 2.5}, force = fN}.damage(68,"neutral","physical")
    ce{name = "stone-wall", position = {center.x-0.5, center.y-2.5}, force = fN}
    ce{name = "stone-wall", position = {center.x + 0.5, center.y-2.5}, force = fN}
    ce{name = "stone-wall", position = {center.x + 0.5, center.y + 2.5}, force = fN}.damage(25,"neutral","physical")
end
