backdrop background blue bright color colorful colour colourful copy copyspace design digital digitally element funky generated graphic illustration image modern pattern perspective point projection radial radiate render retro revival round shape simple simplicity simplistic space square stripe striped stripey style stylish sun sunbeam sunburst symbol texture vector wallpaper alert appropriate-behavior appropriate-behaviour area attention banned boundaries boundary cigarettes communicating communication danger direction directive distance distinctive entrance environment health health-risk limits location no-smoking not-allowed not-permitted painted permission-denied pollution prohibited prohibition shopping-center shopping-centre sign unhealthy warning wording words