Ключевые слова: abstract, backdrop, background, black, cell, cellular, chrome, circle, circular, color, colorful, concept, dark, design, dot, framework, gloomy, grating, gray, grey, grid, hole, idea, industrial, iron, lattice, latticed, mesh, meshed, metal, metallic, net, netting, perforated, regular, reticular, reticulation, round, shape, steel, structure, techno, texture,