html, body {
    background-image: url(https://images4.alphacoders.com/206/206014.jpg);
}

article {
    margin-bottom: 40px;
}

footer {
    background-color: #333;
    color: white;
    text-align: center;
    padding: 20px;
}

img {
    display: block;
    margin: 0 auto;
    max-width: 100%;
    height: 400;
    border-radius: 10px;
}