.body {
margin-top: 0; 
background-image: url('tlo2.jpg'); 
background-size: cover; 
background-attachment: fixed
}
/* unvisited link */
a:link {
  color: white;
}

/* visited link */
a:visited {
  color: yellow;
}

/* mouse over link */
a:hover {
  color: yellow;
}

/* selected link */
a:active {
  color: blue;
}