I do like contour lines, and this little doodle reminded me of wood cut through like when you cut down a tree. You can date the tree by its tree rings (dendrochronology) . I started out doodling round some pink and blue dots that had leaked through the page from a permanent marker pen, and then spread out and out, trying not to overlap the lines. This is like a meditation to me, as the pattern gets larger its more difficult to draw tidy curves and keep the line seperation. This took hours and i really had to concentrate. I’m sure it could be done with a digital platform but this is a fine liner ink pen.
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.