html { 
  background: url(twarz.gif) no-repeat center center fixed; 
  -webkit-background-size: cover;
  -moz-background-size: cover;
  -o-background-size: cover;
  background-size: cover;
}


.dwanaście{
	font-size: 800px;
	margin-top: 0%;
	margin-left: 33%
}