Ключевые слова: abstract, art, backdrop, background, black, blackboard, blank, blue, board, chalk, chalkboard, close, color, colorful, communication, concept, copy, decoration, design, draw, drawing, education, element, empty, frame, graphic, green, grunge, hand, holding, horizontal, line, nobody, old, orange, pattern, pink, red, school, set, shape, sign, space, style, symbol, text, texture, white, write, yellow,