html, body {
    margin: 0;       /* remove the default margin          */
    height: 100%;    /* make the html,body fill the page   */
}
#canvasElement {
    display: block;  /* make the canvas act like a block   */
    width: 100%;     /* make the canvas fill its container */
    height: 100%;
}

#optionsCanvas {
    position: fixed;
    width: 20%;
    top: 10px;
    left: 10px;
    color: white;
    border-style: double;
}

#infosCanvas {
    position: fixed;
    width: 20%;
    top: 10px;
    right: 10px;
    color: white;
    border-style: double;
}

#helpInfos {
    position: fixed;
    width: 20%;
    bottom: 10px;
    left: 10px;
    color: white;
    border-style: double;
}

#helpInfos p {
    margin: 1;
}