abstract angles architectural architecture buildings business-district city city-scapes city-views color colored colors colour coloured colours commercial-building contemporary contrast contrasting distance distant elements exterior external glass heights high high-rise light linear lines metropolis metropolitan-area modern office-buildings perspectives rectangles rectangular reflections skyscrapers tower-block urban-area views walls wealth windows art-glass business coloration commercial decoration decorative distinctive edges geometric geometrical glass-panes height lighting multi-colored multicoloured panes shadows shape shaped shapes Singapore stained-glass sunlight sunshine window-frames window-panes green advice alert announcement appropriate-behavior appropriate-behaviour be-careful beware care careful caution communicating communication concern danger dangerous directions font informing Look looking lookout observant parallel-signage rectangle red reflective risk risks safety sign signage signs slow slow-down speed speed-hump steel-post traffic traffic-sign triangle warning warning-sign watch watch-out white word 3D art backdrop background bars black cells concept connection creative cyber design desktops detail digital dimension electricity electronic element energy form futuristic glow glowing glows graphic graphics grid grids illustration internet lights neon network nights pattern quantum render science scientific scifi shiny space square squares surface technical techno technology texture tile urban virtual virtual reality wallpaper wallpapers web zoom ancient antique artwork blank border brush brushed copy.space copyspace crack cracked crackes cracking damage damaged digital render dirty distressed doodle draw drawing edge effect empty frame funky grunge grungy ink lined messy old paint painted paper pen picture print printed retro rough scratch scratched scratches sketch stationery stroke textured uneven vector vintage weathered alloy alum aluminium.distressed aluminum battered carbon copy cover covering dark diamond floor grundged industrial industry iron lid machined manufacture manufactured metal metallic oval oxidation oxidise oxidised patterned plate rust rusty stain stained stainless steel strenght strengthened strong tough tread wall weirdvis worn turquoise