Edit in JSFiddle

var value = 0
$("#img").rotate({ 
   bind: 
     { 
        click: function(){
            value +=20;
            $(this).rotate({ animateTo:value})
        }
     } 
   
});

img{
   margin: 100px;
}

<script type="text/javascript" src="http://beneposto.pl/jqueryrotate/js/jQueryRotateCompressed.js"></script>
<img src="http://lorempixel.com/250/250/sports" id="img"/>