This is one of the drawings that I made: the flower department.
I had sketched the dooropening and flowers in pencil, when a woman came along to study a vase. She did not stand still for long of course, but the few seconds were enough to get the gesture right (in pencil). Then another woman came around, with a similar coat, another hairdo and a scarf. I still missed something, but a third woman had a bag like this, and that finished the drawing. The rest was just filling the colours.