html {
 background-image: url('https://file.garden/aEnK9GK7YhOgwBQV/third/comics/unnamed/Untitled.jpeg'); 
}

p {
  text-shadow: 1px 1px 0 #FFF, -1px -1px 0 #FFF, -1px 1px 0 #FFF, 1px -1px 0 #FFF;
}