local Dir = {
    DirElement = {
        new = function(num, opposite, name)
            local obj = {
                num = num,
                opposite = opposite,
                name = name
            }
            return setmetatable(obj, {__index = DirElement})
        end,
        toString = function(this)
            return this.num.."/"..this.opposite.."/"..this.name
        end
    },
    UP      = DirElement.new(1,2,"up"),
    DOWN    = DirElement.new(1,2,"down"),
    NORTH   = DirElement.new(1,2,"north"),
    EAST    = DirElement.new(1,2,"east"),
    SOUTH   = DirElement.new(1,2,"south"),
    WEST    = DirElement.new(1,2,"west"),
}