Returning jQuery Object

<script src="jquery.js"></script>
<div id="satu">Holla From jQuery</div>

<script>

(function($){

    $.fn.heading = function(h){
        this.html('<'+h+'>'+this.html()+'</'+h+'>');
        return this;
    };

    $.fn.color = function(c){
        this.css('color',c);
        return this;
    };

})(jQuery);

$('#satu').heading('h1').color('green');

</script>

Output:

Holla From jQuery

Returning jQuery Object