body {
	text-align: center;
	width:100%;
	overflow:hidden;
}

#canvas1{
    position: absolute;
    left:50%;
    top:50%;
    transform: translate(-50%,-50%);
    max-width: 95%;
    height:90vh;
}
#playBtn{
    padding:5px;
    background-color: blue;
    color:white;
    display:none;
}