Very lightly with broad brushes I put two strips on the canvas: a whitish strip and a brown strip. Then I let gravity do the work. Funny to see that some kind of poplar has started to grow, but that's what I see in it. It is paint, pigment, binder, linen and forces that interact. My choice for those jobs is logical, based on the size of the canvas and the brush width (Cloth 20 cm, brush 10 cm)