$(document).ready(function(){
	
	total = 13;
	
	$(".picture").hide();
	
	$("#picture1").fadeIn();
	
	$(document).everyTime(7000, function(i){

		num = i % total;

		if(num == 0) {num = total;}
		
		$("#picture"+num).fadeOut(2000);
		num++;

		if(num == total + 1) {num = 1;}
		$("#picture"+num).fadeIn(2000);
		
		}, 0);
});