Ключевые слова: black, blackboard, board, bright, bulb, business, chalk, chalkboard, concept, creative, creativity, design, doodle, drawing, drawn, education, electricity, energy, flow, frame, graphic, idea, ideas, illuminate, illustration, imagination, innovation, inspiration, intelligence, learn, light, line, llightbulb, pattern, power, school, sign, sketch, solution, studio, success, symbol, think, white,