Implement slider for automatic transition

Question

I took an example of a slider of a question here from the site. I want to know how I can implement it so that it transitions automatically, keeping it by the buttons. Follow the code:

function simpleSlider(type){
        var sliderActive = $("#slider .sliderActive");
            if(type == 'prev') {
                var sliderPrev   = sliderActive.prev().length ? sliderActive.prev() : $("#slider li:last");
                    sliderPrev.addClass('sliderActive').fadeIn();
            } else {
                    var sliderNext   = sliderActive.next().length ? sliderActive.next() : $("#slider li:first");
                    sliderNext.addClass('sliderActive').fadeIn();
                }
                sliderActive.removeClass('sliderActive').fadeOut();
        }
    $(function(){
        $("#slider li:first").fadeIn();

    });
#slider {
list-style:none;
width:800px;
height:700px;
margin:0 auto;
padding:0;
overflow: hidden;
position: relative;
}
#slider li {
position: absolute;
z-index: 0;
display:none;
}
#slider li.sliderActive {
z-index: 1;
}

---

<div class="buttons">
 <a href="javascript:simpleSlider('prev')"><span>prev</span></a>
 <a href="javascript:simpleSlider('next')"><span>next</span></a>
</div>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js">            </script>
<ul id="slider">
<li class="sliderActive"><div class="box_inside box_crm">
    <span class="icon_serv_crm"></span>
    <h3>Lorem ipsum dolor sit amet</h3>
    <p class="principal"><strong>Lorem ipsum dolor sit amet, consectetur adipiscing elit.</strong></p>
    <p>Maecenas sagittis, lorem non imperdiet faucibus, neque turpis porta velit, ultrices ullamcorper elit tellus in nisl. Maecenas enim felis, sollicitudin convallis tristique at, ultrices quis mauris. Pellentesque et fringilla nunc. Phasellus magna metus, placerat eget tincidunt non, dictum non nisi. </p>    
    <div class="content_btn center" style="width:100%">
        <a href="#" class="btn">Saiba mais</a>        
    </div>
</div></li>
<li><div class="box_inside box_landing">
    <span class="icon_serv_land"></span>
    <h3>Lorem ipsum dolor sit amet</h3>
    <p class="principal"><strong>t facilisis et sapien a auctor. Cras in iaculis eros, ac tincidunt mi. Aenean auctor ultricies dolor, sed dictum lectus iaculis sed. Nullam lobortis</strong></p>
    <p>t facilisis et sapien a auctor. Cras in iaculis eros, ac tincidunt mi. Aenean auctor ultricies dolor, sed dictum lectus iaculis sed. Nullam lobortis</p>    
    <div class="content_btn center" style="width:100%">
        <a href="http://localhost/" class="btn">Saiba mais</a>        
    </div>
</div></li>
</ul>

Answer 1

This slider that Voce wants and full width in a box or in the background of the site?

Try it like this

       `$(function(){
            $("#slider li:first").fadeIn();
            setInterval( "simpleSlider()", 3000 );
        });`