Ключевые слова: accident, alarm, alerts, attention, backdrop, background, banner, barrier, careful, caution, construct, construction, crime, danger, dangerous, dirty, disaster, environmental, frame, graphic, grunge, grungy, hazard, hazardous, illustration, industrial, isolated, metal, metallic, notice, old, police, protection, risk, rust, rusty, safety, security, sign, stripes, symbol, technology, template, threats, traffic, wallpaper, warning, worn, yellow, zone,