body {
    top:0;
    margin: 0;
    padding: 0;
    background-position:0 0;
    background-size: 100%;
    background-image: url(https://boliveira.neocities.org/img/background_vector.jpg);
}


.text-center col-md-4 col-md-offset-4 {
 z-index: 15;
 position:fixed;

}