body {
    background-color: black;
    -webkit-animation: fade-in both 1.5s .5s ease-in;
    -o-animation: fade-in both 1.5s .5s ease-in;
    -moz-animation: fade-in both 1.5s .5s ease-in;  
    animation: fade-in both 1.5s .5s ease-in;
}
@keyframes fade-in {
    from {
        opacity:0;
    }
    to {
        opacity:1;
    }
}

#board {
    width: 640px;
    height: 480px;
    margin: auto;
}

canvas {
    border: 10px solid white;
}

pre {
    margin: 10px -5%;
    color: #888;
}