.sticky{
    position: sticky;
    top: 10px;
    right:50%;
    margin-bottom:10px;
}
#tall {
    height: auto;
    width: 50%;
    display: inline;
}
#absolute{
    position:absolute;
    right: 40%;
    top: 50%;
    color: white;
    border: 3px solid black;
    padding: 10px;
}   
#border{
    border: 3px solid black;
    display: inline;
    padding-top: 102%;
    padding-left: 5px;
    position: relative;
}
#footer{
    position:relative;
    text-anchor: left;
}
#BackToTop{
    position:fixed;
    right: 10px;
    bottom:1px;
}