abstract appearance background brown colored coloring colors coloured colouring colours contours contrast contrasts cracks fissures flaws grit gritty layered layers levels light lines natural ribbons rock rock-face rockface rocky rough rugged sandstone sandy shade shades of color shades of colour shadows shape shaped shapes stone strata stratum sunlight sunny sunshine surface surfaces texture textured textures veins wallpaper angles artistic backdrop black blended blue bright brilliant circles circular color colour corners decoration decorative design detailed detailed patterns edges geometric geometrical green image images interconnected intermeshed interwoven kaleidoscopic patterns mandala patterns perspectives pointed points radiating rays rounded sharp spiral spiraling spiralling style vibrant white yellow boards circuit-boards circuitry communication complexity complx components computer computer-hardware connected connecting connections devices distinctive electrical electricity electronics equipment fusible-metal-alloy gadgetry inside interlinked internal linked links metal miniature no-longer-in-use outdated part parts permanently-bonded plastics printed-circuits recycling solder solidify technology unwanted useless