body {
    margin: 0;
    padding: 0;
    font-family: Arial, sans-serif;
    background-color: black; /* Change background color to black */
    color: white; /* Change text color to white */
}

.container {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

.row {
    display: flex;
    justify-content: space-around;
    margin-bottom: 20px;
}

.shape {
    width: 100px;
    height: 80px;
    border: 10px solid;
    border-color: #888 #777 #666 #555; /* Three shades of grey for the borders */
}

.rectangle {
    background-color: #ddd; /* Light grey background color */
}