How to change the position of User/Inbox/Alert from navigation bar to top

I need help on how to change the position of user,inbox and alert to top because the 3 locates on the navigation bar and i want them to separate



My friend sent this code to me but i dont know where to put these.

div {
position:fixed;
top:0;
width:100%;
height:35px;
background-color:black;
border-bottom:1px solid white;
}