.achtergrond_piet {

    width: 490px;
    height: 492px;
    background-color: #ffffff;
    border: 3px solid black;
}
.divA {
    width: 486px;
    height: 50px;
    background-color: #ff0000;
    border: 3px solid black;
}
.divB {
    width: 50px;
    height: 200px;
    background-color: #0022ff;
    border: 3px solid black;
    float: right;
}
.divC {
    width: 50px;
    height: 50px;
    background-color: #000000;
    border: 3px solid black;
}
.divD {
    width: 450px;
    height: 50px;
    background-color: #ffe800;
    border: 3px solid black;
}
.divE {
    width: 100px;
    height: 50px;
    background-color: #ff0000;
    border: 3px solid black;
}
.divF {
    width: 50px;
    height: 50px;
    background-color: #0048ff;
    border: 3px solid black;
}
.divG {
    width: 370px;
    height: 50px;
    background-color: #000000;
    border: 3px solid black;
}
.divH {
    width: 200px;
    height: 50px;
    background-color: #ffe800;
    border: 3px solid black;
}
.divI {
    width: 400px;
    height: 105px;
    background-color: #0033ff;
    border: 3px solid black;
}

.extreme_headerbalk {
    background-color: #bf3759;
    font-size: 30px;
    font-family: Arial, sans-serif;
    width: 100%;
    color: white;
    padding: 20px;
    text-align: center;
    box-sizing: border-box;
    height: 80px;
}