I like spirals very much, but I don't often use them - don't know why. So this challenge was a good occasion to turn around!
Thank you for your nice comments and have a good week.
Later, on 25.03.
I tried a Zia with spirals. The paper is a light grey sketching paper. Pens: Sakura Micron, Tombow Brush Pen, white charcoal and black pencil.