After trying few Zen-tagles with black pen/ pencil, was very much eager to do something with colouring the tangles. I always enjoy playing with colours. The time that I most appreciate creating art is when I just want to colour.
One may wonder how to start doodling. The simplest answer I can offer is to just begin and then you will be surprised what you have created.
Put your pen to paper and see where your hand takes you. There are no rules except for the ones you make for yourself.  There is more to it than filling a page with circles and swirls.