abstract advertisement background blank blank canvas blank sign blue border canvas concept curve distance frame frames gallery graphic path perspective rectangles render shadow sign style swoosh texture vector warp white advertising appearance black communicating communication expressing expression general-sign indication information informative informing invitation inviting message movies notification notifying open park promoting public red signs words advice alert announcement appropriate-behavior appropriate-behaviour be-careful beware care careful caution concern danger dangerous directions font Look looking lookout observant parallel-signage rectangle reflective risk risks safety signage slow slow-down speed speed-hump steel-post traffic traffic-sign triangle warning warning-sign watch watch-out word arab arabic cutout isolated roadsign roadsigns Antiques lettering paint trim unique wood copyspace decay decaying dystopian old cats eyes humor humour metal road ban prohibition staff only trespassers zoo funny geology joke plate tectonics mobile phone phone rules sound authorised restricted