body {
    padding-top: 70px;
}

.box {
    float: left;
    height: 10px;
    width: 10px;
    margin: 2px;
    border: 1px solid black;
}

.clear {
    clear: both;
}

.red {
    background-color: red;
}

.blue {
    background-color: blue;
}

.green {
    background-color: green;
}

.yellow {
    background-color: yellow;
}

.orange {
    background-color: orange;
}

.empty {
}