door with security warning

alert alive area atom atomic attention beware biohazard black bomb careful cause caution chemical composition construction contageous contaminated contamination contimantion creative danger dangerous dark deadly death desease design dirty disease door doors enter entrance entry gate graphic graphics grunge grungy hard hazard health illustration iron medical metal nuclear old pattern protection radioactive radioactivity reaction recommendation red restriction risk rusty safety secure security sign spray sprayed steel stop stripe striped stripes symbol texture under uranium wallpaper war warning waste yellow zone