File: css/led-matrix-square-green.css

.led {
    width: 10px;
    height: 10px;
    background: #444;
    box-shadow: 0 0 0 #444;
    margin-right: 3px;
    margin-top: 3px;
}

.led.active {
    background: #6cff38;
    box-shadow: 0 0 16px #6cff38;
}

.char_matrix {
    top: 0;
    padding-left: 3px;
    float: left;
    width: 10px;
    height: 110px;
    padding-top: 4px;
    background: rgb(56, 56, 56); /* Old browsers */
    background: -moz-linear-gradient(top, rgba(56, 56, 56, 1) 0%, rgba(33, 33, 33, 1) 100%); /* FF3.6+ */
    background: -webkit-gradient(linear, left top, left bottom, color-stop(0%, rgba(56, 56, 56, 1)), color-stop(100%, rgba(33, 33, 33, 1))); /* Chrome,Safari4+ */
    background: -webkit-linear-gradient(top, rgba(56, 56, 56, 1) 0%, rgba(33, 33, 33, 1) 100%); /* Chrome10+,Safari5.1+ */
    background: -o-linear-gradient(top, rgba(56, 56, 56, 1) 0%, rgba(33, 33, 33, 1) 100%); /* Opera 11.10+ */
    background: -ms-linear-gradient(top, rgba(56, 56, 56, 1) 0%, rgba(33, 33, 33, 1) 100%); /* IE10+ */
    background: linear-gradient(to bottom, rgba(56, 56, 56, 1) 0%, rgba(33, 33, 33, 1) 100%); /* W3C */
    filter: progid:DXImageTransform.Microsoft.gradient(startColorstr="#383838", endColorstr="#212121", GradientType=0); /* IE6-9 */
}

.char_matrix > ul {
    list-style: none;
    margin: 0;
    padding: 0;
}