Composition in green and blue

‘composition in green and blue’, drawing/painting in a sketchbook, background calculation paper

I tried to use only shades of green and blue when I started this piece. But somehow I missed the yellow. Hence the sun flower form in the middle.
The background is made of calculation paper, which reminds me so much of high school, where I loved mathematics. It was my favorite subject next to art. Funny fact is that one of my boys now has a bachelor degree in mathematics. All is connected…