#container {
    height: 100%;
    width: 100%;
}

* {
    margin: 0;
    padding: 0;
}
    
body, html {
    height: 100%;
}
    
#canvas {
    position: absolute;
    width: 100%;
    height: 100%;
}
        
#instructions {
    position: absolute;
    top: 0;
    left: 0;
    padding: 10px;
    color: white;
    font-family: Helvetica, Arial, sans-serif;
    font-size: 12;
    line-height: 16px;
}