Make a painting of trees in a forest, create a space between the trees.
There’s an old forest, Witherle Woods, in Maine, close to the Canadian border. The story goes that it used to be a hideout from the Dutch for the Abinaki Indians, in the 17th–18th centuries. The trunks closest to the viewer are in warm colors: yellowish ochre with traces of cadmium orange and different temperatures of red. The trees in the middle are greenish, going from cold blue green to a warm green. And the trees farthest away are in hues of blue, going from ultramarine blue to a more Prussian blue, to Caribbean blue.