p:before { 
  content: "<P>";
}

p {
  background: #ffddff;
  border: 1px dashed black;
}

ul { 
  border: 1px dashed black;
}


dl { 
  border: 1px dashed black;
}

dt {
  border: 1px dashed black;
}

div:before { 
  content: "<DIV>";
}

div { 
  border: 1px dashed black;
}

span:before { 
  content: "<SPAN>";
}

span { 
  border: 1px dashed black;
}
/* br { border: 1px dashed blue; display: block; width: 1px; height: 10px; background: black; } */