Natural Clay In-The-Pot Soap Swirl

One of my first tries with cold process soap was doing In The Pot Swirl.  I used a purple ultramarine from TKB Trading in Oakland, CA.  But I saw this tutorial from Lovin' Soap Studio called Natural Clay In-The-Pot Soap Swirl.  To be honest it looks easy enough to do,plus I have two colored clays that I could try in this.