canvas {
    display: block;
    margin: auto;
    position: fixed;
}
body{
    margin:auto;
    padding:0px;
    align-content: center;
}
#turn{
    width:100%;
    height:100%;
    position:fixed;
    top:0px;
    left:0px;
    background-color:white;
    background-image:url('playportrait.png');
    background-repeat:no-repeat;
    background-position: center center;
    background-size: cover;
    display:none;
}