background irregular old random speckled stone texture wall abstract colourful glass horizontal light ripples shape shapes stripes structure structures textures waves data dots Fractal fractals glow glowing high hot hotspots mathematics pattern resolution spots sundfractals wallpaper architecture brick bricks building stones ahead alert arrow attention black care caution colorful coloring colors colouring colours communicate communication curve curves curvy danger dangerous difficult driving hazard irregularity journey line outdoors risk risky road roadsign roadway sign slow-down speed symbol traffic transportation travel turn turning turns warning winding yellow boundary decorative grey patterns box cable complicated electricity fuse mess shreds torn urban wire wiring blue grid reflections shine shiny solid translucent window backdrop broken form forms grunge shot element marble mosaic pastel surface