Fade in and Fade Out Text in DIV - Remove Loop

I have created a DIV with 3 different quotes fade in and fade out. I am using below JQuery code for the same.

(function() {
var quotes = $(".changetxt");
var quoteIndex = -1;
function showNextQuote() {
    ++quoteIndex;
    quotes.eq(quoteIndex % quotes.length)
        .fadeIn(1000)
        .delay(4000)
        .fadeOut(500, showNextQuote);
}
showNextQuote();
})();

HTML CODE

<div class="toptext">
    <div class="changetxt">
        ”The simple act of paying positive attention to<br> 
        people has a great deal to do with productivity”
        <p>- Tom Peters</p>
    </div>

    <div class="changetxt">
        ”If you deprive yourself of outsourcing and your competitors<br> do not, you are putting yourself out of business”
        <p>- Lee Kuan Yew</p>
    </div>

    <div class="changetxt">
        ”Focus on being  PRODUCTIVE<br>
        instead of busy”
        <p>- Tim Ferris</p>
    </div>
</div>

It is working perfect but I don't want to loop, There are 3 quotes, so as soon as it shows last (third) quote it should stop animation and no loop.

How can I achieve this?