Ключевые слова: abstract, advertising, announce, announcement, background, billboard, black, blackboard, blank, board, business, chalk, chalkboard, class, classroom, communication, concept, copy, design, drawing, education, empty, frame, green, grunge, learning, market, marketing, menu, message, nobody, old, restaurant, retro, rubbed, school, sign, space, surface, teach, texture, textured, vintage, wall, wood, wooden,