Ключевые слова: accuracy, action, background, black, blue, bright, clock, color, colored, concept, copy, countdown, counting, crystal, dark, deadline, eternity, expire, finish, flowing, glass, hour, hourglass, idea, life, management, measure, measurement, minute, object, old, passing, past, patience, period, process, retro, running, sand, sand clock, sandclock, sandglass, second, space, start, text, time, timer, wasting, watch,