在网页上组合多个图像,然后单击按钮单独更改它们

I'm an ammature when it comes to webdesigning, I sort of ctrl+c > ctrl+v all of the time trying to learn. At the moment I'm making a webapplication for selecting cushions on a couch. I created a page where you can click on a color to see the cushions in that specific color, but I would like to change the color of the base of the couch also.

In short: I would like to place 2 png images on top of each other and be able to change them individually by clicking on colors.

My code for now:

<body>
<div id="page">
    <div id="gallery">
        <div id="panel"><img id="largeImage" src="images/image_01_large.png"/>

            <div id="thumbs">
                <img src="images/image_01_thumb.png" alt="Lime Green"/>
                <img src="images/image_02_thumb.png" alt="Burgundy"/>
                <img src="images/image_03_thumb.png" alt="Cobalt Blue"/>
            </div>
            <script>
                $('#thumbs').delegate('img', 'click', function () {
                $('#largeImage').attr('src', $(this).attr('src').replace('thumb', 'large'));
                $('#description').html($(this).attr('alt'));
            });