warning sign on old grungy wall. monochrome abstract grunge yellow black warning sign on old grungy wall. monochrome a

abstract aged alarm alert attention backdrop background banner biohazard black careful caution concept damaged danger dangerous decorative design dirty graphic grunge grungy hazard hazardous illustration illustrationwarning message monochrome note old paint pollution protection radiation radioactive retro rough rust rustic safety scratch security sign stop street style symbol template text texture threat vintage wall wallpaper warning yellow