Prompt: Vector drawing for a coloring book, a traditional American tree house circa 1950 sitting between 2 branches of a big oak tree, lightly pencil colored, tire swing and rope ladder, "architectural"  free hand sketching, simple ultra fine copic marker simple line work, overlap corners, layout lines black, continuous lines, intricate details, insanely detailed, orthogonal projection, two point perspective with layout lines, environment with trees, sergio toppi style, sketchup program drawing, 
Negative prompt: words, logos, writing, signatures, people, bodies