canvas {
    display: block;
    position: absolute;
    margin: auto;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    border: 1px solid black;
    user-select: none;
    -ms-user-select: none;
    -webkit-user-select: none;
    -khtml-user-select: none;
    -moz-user-select: none;
    -webkit-touch-callout: none;
    -webkit-user-drag: none;
}

html, body{
padding: 0;
margin: 0;
background-color: gray;
}

audio{
    margin-left:40% ;
    
}

div {
    height: 200px;
    width: 200px;
    
}