.lavaLamp {
position: relative;
height: 29px;
width: 900px;
padding: 5px; margin: 5px 0;
overflow: hidden;
}
/* Force the list to flow horizontally */
.lavaLamp li {
float: left;
list-style: none;
}
/* Represents the background of the highlighted menu-item. */
.lavaLamp li.back {
    background-color: #7fb0f0;
    width: 9px; height: 30px;
    z-index: 8;
    position: absolute;
}
    .lavaLamp li.back .left {
        background-color: #7fb0f0;
        height: 30px;
        margin-right: 9px;
    }
/* Styles for each menu-item. */
.lavaLamp li a {
    position: relative; overflow: hidden;
    text-decoration: none;
    text-transform: uppercase;
    font: bold 14px arial;
    color: #fff; outline: none;
    text-align: center;
    height: 30px; top: 7px;
    z-index: 10; letter-spacing: 0;
    float: left; display: block;
    margin: auto 10px;
}