local module_1 = {} -- This name can be anything
module_1.new = function(_x,_y) -- create a table dynamically with the "new function"
    local obj = {}
    obj.x = _x
    obj.y = _y

    obj.pp = function(self) 
        print(string.format("(%d,%d)", self.x, self.y)) 
    end
    return obj 
end

return module_1