What is the relationship between planchette writing and Taoism

Folk custom of "zigu" please spread open later, the wind of planchette writing big sheng.In song dynasty, planchette writing is not only simply please "zigu", as the other gods of Taoism as virtual reality, the reality is too b also often appear in the process of planchette writing, sometimes even Taoism ofuda will appear, is becoming more and more closely the relationship between the planchette writing and Taoism, even when the warlock planchette writing please is no longer the "zigu", but the daoist immortal.