html {
  background-color:#00FF00;
}
pre { 
  font-size:25px;
  font-family:Helvetica, Arial;
  font-weight: bold;
  letter-spacing:-1px;
  background-color:#ffffff;
  padding:50px;
  color:#000000;
  text-align:left;
  border-bottom:1px dashed #cccccc;
  border-top:1px dashed #cccccc;
  margin:0px;
}