Yeah i did come up with digital myself, sort of by accident though! Twas my first set after all. Started off basically doing gimps 'predator' effect on a load of lines to see what happened, colourized them green and it turned out all circuity.
Gave it a bit of warping to do the bendy bits and then spent ages doing pixel by pixel editing for the eyes and detailed bits of pattern. Then just cut it up and mirrored it different ways ans spliced bits back together again to make all the various textures. Not sure about the 1 colour thing, but it might look better with toxic or titan now i think about it.