body,
html {
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 0;
    background: black;
}
.graph-container {
    width: 480px;
    height: 640px;
    margin: 0 auto;
    border: 1px solid gray;
}
#message {
    color: deepskyblue;
    font-size: 24px;
    position: absolute;
    max-width: 320px;
    display: block;
    font-family: monospace;
    color: #999;
    top: 10px;
    left: 10px;
}