Ключевые слова: alarm, alertness, backdrop, backgrounds, bell, clock, closeup, color, countdown, day, deadline, design, education, equipment, face, food, fruit, green, hand, ideas, illustration, instrument, isolated, leaf, learning, lunch, measurement, minute, number, object, office, paper, pencils, red, reminder, science, second, sign, single, success, symbol, time, timer, top, up, waking, watch, yellow,