Place an object in a corner

There's a red triangle in the bottom right corner of this site. Here's how it is done.
First, paste this HTML into a code block in the footer.

<a id="corner" href=""></a>

Add this CSS into the your Custom CSS. Then change the image URL and whatever.

#corner {
    position: fixed;
    bottom: 0;
    z-index: 99999 !important;
    right: 0;
    width: 180px;
    height: 180px;
    text-align: right;
    transition: @transition-fast;
    background: url(;
    background-size: contain;
    background-position: center;
    background-repeat: no-repeat;

#corner:hover {
  opacity: @opacity-high;

@media @640 {
  #corner {
  width: 90px;
  height: 90px;