Ключевые слова: alert, attention, backdrop, background, black yellow background, building, business, caution, cement, coarse, concept, concrete, construction, construction sign, copy space, danger, do not enter, economics, finance, incomplete, industrial, progress, risk, safety, sign, simple, stay away, stripes, text, texture, typewriter, under, under construction, wall, warning, warning sign, work, work in progress,