Ключевые слова: abstract, alarm, alert, attention, background, caution, crisis, critical, danger, dark, emergency, error, exclamation, forbidden, glowing, hazard, illuminated, important, light, luminous, mark, night, notice, notification, prevention, problem, protection, red, reflection, restriction, risk, safety, security, sign, signal, solution, stop, symbol, threat, triangle, urgent, warning,