abstract angles artistic backdrop background black blended blue bright brilliant ceiling light circles circular color colored colors colour coloured colours corners dark decoration decorative design detailed detailed patterns edges geometric geometrical green image images interconnected intermeshed interwoven kaleidoscopic patterns light lines mandala multicoloured overhead patterns perspectives points purple radiating rays rounded shapes sharp style texture textures vibrant wallpaper white yellow bridge building buildings bus buses construction control detour development double-decker buses empty equipment excavation excavations excavator fences fencing MRT property railway redevelopment redirection roadwork safety Singapore space stairs steps temporary traffic vacant blocks walkway AC ampere cable current distribution electric electrical high installation insulation insulator line pole post power volt voltage wire wires