abstract architectural background barrier basic brick-wall brickwork cement colored colorful colors coloured colourful colours construction contrast cutouts decorated decorations exterior external firm gray grey linear lines mortar perspective perspectives rough secure security solid strength strong style surface surfaced surfaces texture textured textures variation varied various wall walled wallpaper well-built backdrop brick bricks builders building coloring colouring concrete constructed construction-work holes hollow rectangular standard uneven smooth traditional-brick-wall architecture building-construction building-site building-work buildings cement-mixers construction-site development elements equipment framework home home-units homes house light materials men metal-work mixers modern pipes sand structure suburban supplies units urban walls work workers workmen dark