body
 {
     background-image: url(https://cloud.motronik.com.pl/sts-51b.jpg); no-repeat center fixe
        -webkit-background-size: cover;
        -moz-background-size: cover;
        -o-background-size: cover;
         background-size: cover;
.........
 }
h1
{
 color: blue;
 font-size: 64px;
 font-weight: 700;
 text-decoration: none;
 font-family: 'Oxygen', sans-serif;
 text-align: center;
}
.
h2 {
 color: orange;
 font-size: 32px;
 font-weight: bold;
 text-decoration: none;
 text-align: center
 }

a:link
{
color:orange;
}
a:visited
{
color:orange;
}
a:hover
{
color:yellow;
}