/* background gradient color */
    body {
        background: linear-gradient(to left, lightblue, lightgreen);
        text-align: center;
    }

/* style for box that holds the slideshow */
    #slideshow {
        margin: 20px auto;
        width: 400px;   
        height: 300px;  
        border: 10px solid #654;
        background: #fff;
        border-radius: 20px;
    }

/* style for the images in the box */
    #slideshow img {
        max-width: 100%;
        max-height: 100%;
        display: block;
        margin: auto;
    }

/* style for footer where returh to homepage button is */
    footer {
        margin-top: 150px;
    }