Ключевые слова: advert, advertisement, advertising, art, backdrop, background, billboard, black, blackboard, blank, board, chalk, chalkboard, class, clean, concept, copy, dark, design, desk, dirty, drawing, education, empty, frame, graphic, grunge, grungy, learn, lesson, message, monochrome, note, old, pattern, retro, rubbed, school, scratch, sign, space, surface, teach, template, text, texture, used, wall, wallpaper, write,