body {
  background:black;
  font-family:'Courier New';
  color:white
}
 
div {
  border: 0px solid black;
}

#header {
  border:1px solid white;
  width:700px;
  font-size:30px;
  margin:auto;
  text-align:center;
  background: url('https://file.garden/ZWlUCY4S7Xz2vypS/archived%20backgrounds/stars%20%26%20space/space2.gif')
}
  
#nav {
  text-align: center
}

#buttonlink {
  border:1px solid white;
  width:700px;
  font-size:18px;
  margin:auto;
  text-align: center;
  background: url('https://file.garden/ZWlUCY4S7Xz2vypS/archived%20backgrounds/colours/black/bgmagenta.gif');
}