Ключевые слова: abstract, alert, art, attention, background, beware, black, business, button, caution, concept, construction, danger, dangerous, design, element, error, exclamation, flat, graphic, hazard, icon, illustration, information, internet, isolated, label, light, logo, mark, message, point, risk, road, safety, security, shape, sign, silhouette, simple, site, stop, symbol, template, traffic, triangle, warning, web, website,