Ключевые слова: ar, art, background, book, business, concept, conceptual, continuous, continuous line, creative, design, diary, document, doodle, drawing, drawn, education, graphic, hand, hand drawn, icon, illustration, isolated, knowledge, learned, learning, library, line, linear, lines, literature, minimalism, minimalist, object, one, open, outline, paper, read, reading, school, sign, simplicity, single, sketch, stack, study, symbol,