$(document).ready(function() {
    var slide = function () {
        window.setInterval(function () {
            var shown = 0;
            shown += 1;
            if (shown === 1) {
                $('#html5').fadeOut(3000);
                $('#css3').fadeIn(3000);
            }
            if (shown === 2) {
                $('#css3').fadeOut(3000);
                $('#java-script').fadeIn(3000);
            }
            if (shown === 3) {
                $('#java-script').fadeOut(3000);
                $('#html5').fadeIn(3000);
            }
            slide();
        }, 5000);
    };
    slide();
});