For those who expressed interest in the process. I've drawn one this morning with pics taken.
This ruler: Sewing Revolution from Queensland. Phone: 07 5532 7242
Thumb tack in the centre, choose a circle and place your pencil in one of the little holes. Holding the thumb tack in place, draw a circle by using the pencil to rotate the ruler. Drawn a number of different size circles
Using your ruler mark divisions across your circles through the centre.
Now it is just a matter of erasing lines you don't want ie in the centre, and joining others to form triangles!
Now I cut the circles out and. Paper piece each round, outer circle, next circle etc. the circles are attached to each other by appliqués.
when I have some energy to paper piece again, I'll take pics if any one is interested!