local generate_house = function( minp, maxp )
    local height = 5
    local width = 6
    local length = 6
    local amount = math.random(0, 10)
    for a = 0, amount do
        if (math.random() < 0.5) then
            local pos = {
                x = math.random( minp.x, maxp.x ),
                y = math.random( minp.y, maxp.y ),
                z = math.random( minp.z, maxp.z ),
            }
            local px = { x=pos.x, y=pos.y, z=pos.z }
                local nx = minetest.env:get_node( px )
            if nx.name == "default:dirt" then
                for i = 0, width do
                    for j = 0, height do
                        for k = 0, length do
                            if (pos.y > 0) and (pos.y < 30) then
                                local p = { x=pos.x+i, y=pos.y+j, z=pos.z+k }
                                    local n = minetest.env:get_node( p )
                                --if n.name == "air" then
                                    if (p.x >= pos.x+1 and p.x <= pos.x+(width-1)) and (p.y >= pos.y+1 and p.y <= pos.y+(height-1)) and (p.z >= pos.z+1 and p.z <= pos.x+(length-1)) then
                                        --skip
                                    else
                                        minetest.env:add_node( p, "default:cobble" )
                                    end
                                --end
                            end
                        end
                    end
                end
            end
        end
    end
end

minetest.register_on_generated(generate_house)