body {
  background-image: url(room.jpg);
  background-repeat: no-repeat;
  background-attachment: fixed;
  background-size: cover;
  background-color: black;
  font-family: courier;
  color: white;
  size: 100px;
}

#center {
position: absolute;
width: 500px;
height: 700px;
z-index: 15;
top: 50%;
left: 50%;
margin: -250px 0 0 -150px;
font-size: 30px;
background-color: black;
}

a {
  color: cyan;
  text-decoration: none;
  border-bottom: 10px;
  transition: color .5s ease;
}
a:hover {
color: whitesmoke;
}