Ключевые слова: abstract, art, backdrop, background, black, blank, business, concept, dark, design, door, entrance, escape, freedom, hole, home, house, idea, isolated, key, keyhole, light, lock, metal, mind, mystery, object, open, privacy, protection, safe, secrecy, security, shape, shine, shiny, sign, silhouette, solution, space, success, symbol, technology, tunnel, vision, wall, way, white,