Drawing spirals calms me. Following the contours round. Sometimes I add a dot so that the line has to deviate around it. I used all my metallic pens for this, mainly silvers, a gold and a purple. I did have a green but it has almost run out. I think this looks a bit like a tree trunk, like dendrochronology. Tree rings that you can look at to see how old the tree is (the outer ring is the one which was current when the tree was cut down). If you count inwards then each ring represents a year generally. You can alsu tell by the thickness of the line. I know that’s not what my drawing represents, but it’s what I see when I look at it.