You know, I am not sure if this kind of work is art proper..
Its not difficult to do. But I really dont know how to explain it: I dip a small brush into one coloured gel (take a small blob) and draw out that blob in any convenient fashion (twists, twirls..) on a sticky ubderlayer. Repeat the same with the other colours you use, watch the overall picture, though there is really no picture at all just some primordial chaos :green: thats what it is to me eye. But see to it that you make a pretty chaos . Sorry for the pun.