body{
    /* royalty free image by eberhard grossgasteiger */
    background-image: url("galaxy.jpg");
    background-size: cover;
    background-repeat: no-repeat;
    background-position: center center;
}

.center {
    text-align: center;
    margin: 0px auto;
    color: white;
}

canvas {
    padding-left: 0;
    padding-right: 0;
    margin-left: auto;
    margin-right: auto;
    display: block;
    width: 700px;
}