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

.jedenaście{font-size: 60px;
margin-top: 12%;
margin-left:40% 
}