div#border
{   width:40px;
    height:40px;
    background-color: white;
    border-bottom: 15px solid red;
    border-right: 15px solid blue;
    border-left: 15px solid darkblue;
    border-top: 15px solid darkred;
    display: inline-block;
    vertical-align: middle;
    margin-left: 2em;
}