Hello! I heard from a friend that there is a code for floating items to appear on top of the page....what is that code?? :c

Please and thank you!

.floating_item {position:fixed !important; left:20px !important; top:7px !important; z-index:999 !important; margin: 0px !important; border: 2px solid ; box-shadow: 0px 0px 1px 2px ; -webkit-box-shadow: 0px 0px 1px 2px ;}

Thankies <3