body{
  margin: 0;
  min-height: 100vh;
  background-image: url("https://i.pinimg.com/originals/c1/d2/c5/c1d2c54776b1ce13100065edb7b7ab63.gif") repeat center center fixed;
  background-size: cover;
}

a{
 color:#00ffff;
 display:block;
 margin:10px;
}