.blackribbon {
position:fixed; margin:0; padding:0; z-index:10000;
}
.blackribbon-top-left {
top:0; left:0;
}
.blackribbon-top-right {
top:0; right:0;
}
.blackribbon-bottom-left {
bottom:0; left:0;
}
.blackribbon-bottom-right {
bottom:0; right:0;
}