h1{
    text-align: center;
}

.LijnBoven{
    height: 20px;
    width: 100%;
    background-color: black;
    opacity: 0.9;
    position: absolute;
    top: 0px;
    padding-left: 20px;
}

.div1 {
    height: 700px;
    width: 100%;
    background-image: url("Vioolbackground.jpg");
    background-size: auto 700px;
    background-repeat: no-repeat;
    position: absolute;
    top: 30px;
}

.div1a{
    padding-top: 0px;
    border-radius: 25px;
    height: 670px;
    width: 35%;
    background-color: #fdfefd;
    opacity: 0.95;
    position: absolute;
    top: 0px;
    bottom: 20px;
    right: 20px;
    padding-left: 20px;
}

.LijnOnder{
    height: 20px;
    width: 100%;
    background-color: black;
    opacity: 0.9;
    position: absolute;
    top: 740px;
    padding-left: 20px;
}

iframe {
	width: 100%;
	height: 40%;
}


/* iframe {
    display: block;
    margin-left: auto;
    margin-right: auto;
} */