arc arcs back background backgrounds curve curves geometric geometrics graphics gray line lines shade shades shadows shape shapes splines sundfractals abstract backdrop black blue cold dark design freeze frost frozen gloomy grunge grungy ice icy texture wallpaper winter ancient architecture balcony building city dappled grey historical home house Italy old shutters three trio urban Venice window anticipating base blocks brick cement construction hole holes material pattern patterns roof square street structures Cornish cornwall England english eroded erosion geology Great Britain layers natural nature rock sedimentary silver worn yellow cracked brown bushes canyon clouds desert grass green mountains plants red road rocks sky springtime Tan trees Utah white bird eye feathers head hope London orange pest pigeon plumage wing