ba1969 background fabric grid paint patchwork texture tiles electricity energy power pylons basement window grate grating gridiron trellis window air amber brown bubbles bubbly floating swirl water diamond plate diamond sheet metal pattern sheet metal architecture element elements glass glasses square squared squares boxed boxes compartments frame grid. shelves wood box wooden frame cardboard corrugated cushion lines paper protection wrap administration high house modern.office office building skyskraper tower skyscraper