Ключевые слова: abstract, alert, art, attention, background, ban, brick, bright, caution, color, colorful, concept, contour, danger, design, energy, flat, forbidden, glowing, graphic, hazard, health, icon, industrial, information, isolated, light, line, linear, lineart, neon, notice, object, outline, power, prohibition, protection, red, risk, road, safety, security, sign, stop, street, symbol, traffic, transportation, wall, warning,