div.arena {
    position : relative;
    paddding : 0em;
    border : 2px blue solid;
    height : 300px;
    width : 350px;
}

div.arena span {
    position : absolute;
    top: 10mm;
    left: 40mm;
    background: #FD9; border : #FD9 thin outset;
    white-space: nowrap;
}