help with a simple plugin to roll images

$.fn.rolly = function(options) {
        var settings = {
                speed: 'fast',
                delay: 10000
        }
        if(options)
                $.extend(settings, options);
        $.rolly.rollover(settings);
};
$.rolly = function() {}
$.rolly.rollover = function (settings) {
        $(this).children().get(0).animate( { width: 'hide', opacity: 'hide'
}, settings.speed).appendTo(this).show(settings.delay);
}


this doesn't work ... everything I tried didn't work... help!