#openfl-content{
    z-index: 0;
    position: absolute;
    top: 0px;
    left: 0px;
}

#additional-content{
    z-index: 10;
    position: relative;
    visibility: hidden;
    left: calc(50vw - 40vw);
    top: calc(50vh - 40vh);
    width: 80vw;
    height: 80vh;
}

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