The background is swirls of blue, purple and black reminiscent of Van Gogh's Starry Night.
You can hang the trees as far or as close together as you like, going from a 12"x12" square to whatever your heart wants.
But if you want to break the pieces up they all look great on their own. All sides are painted to continue the illusion of a reaching forest if you don't want them together.
I spray each painting with a protective gloss to preserve the painting and colors.
Signed by the artist on the back.