Blacky starts stroking with red paint in the middle of the paper and continues to stroke towards the lower left corner, where she is also sitting. Next, she strokes from the corner to the middle and vice versa. She then applies white paint while dotting the brush onto the red color field. Finally, she strokes the white paint onto the red until the whole area has one monotone color.
This manifestation shows that Blacky is relating her application to the position of her body. It also shows that she is perceiving a contrast in color, as in red and white, and is reacting on that in stroking until there is one monotone color field in the end.