body {
    margin: 0;
}
img {
    width: 800px;
    height: 500px;
    float: right;
}
body {
    background-color: darkseagreen
}
header {
    background-color: darkcyan;
    color: white;
    padding: 20px;
    text-align: center;
    font-size: 2rem;
}