abstract angle angles appearance architectural architecture background basic brick brick-wall bricks color colored colors colour coloured colours exterior external historic old perspective perspectives rough smooth solid standard strength surface surfaces texture textured textures uneven variation varied various wall wallpaper paint painted bars door green metal secure security step backdrop building caught central city city coloring colouring contrast contrasting dangling glass wall hanging loose office block overhead pair pairs powerlines reflections shoes sneakers street strung along suspended variety windows desktop fiction Fractal future futuristic light lightin other science walls write