I ended up using a lighter Van Gogh green for the grass and a darker Van Gogh green for the swirls. There are also pockets of glue left over from the swirls. Quickly, I need to choose the right tesserae for the background and get busy. Glue is liquid treasure; and one of the ways to save money is not to be wasteful. The tree needs to be the receiver of visual attention, so the background will not be Van Gogh. I do not want competing elements in this design.