Edit in JSFiddle

var rect;
var i=1;

window.onload = function(){
    var paper = Raphael(0,0,"100%","100%");
    rect = paper.rect(0,0,100,100)
        .attr({fill:"45-#000-#202-#305"
               ,opacity:0.1});

}

    function clone(){
        //削除する
        rect.clone().attr({x:i*10,y:i*10});
        i++;
    }

<script type="text/javascript" src="http://dl.dropbox.com/u/63305355/raphael-min.js"></script>
<div id="canvas">
    <div class="text">
        CLONE
        <br>
        <input type="button" value="コピー" onclick="clone()" />
        <div id="result"></div>
    </div>
</div>

body,html
{
    height:100%;
    margin:0;
}

#canvas 
{
    height:99%;
    background:#fff;
    text-align:center;
}

.text{
    letter-spacing: 20px;
    color:#fff;
    font-size:150%;
    width:60%;
    height:60%;
    position:absolute;
    left:20%;
    top:40%;
    z-index:1;
}
#result{
    font-size:60%;
    letter-spacing: 5px;
}
input{
    padding:3px;
}