Зациклить счётчик на определённый период

year = 2015; month = 6; day = 14; hour= 24; minute= 0; sec= 0;
 
function CountBox() {
    dateNow = new Date;
    amount = dateFuture.getTime() - dateNow.getTime() + 5;
    delete dateNow;
    if (amount < 0) {
        out = "<div class='countbox-num'><div class='countbox-days1'><span></span>0</div><div class='countbox-days2'><span></span>0</div><div class='countbox-days-text'></div></div>" +
        "<div class='countbox-space'></div>" +
        "<div class='countbox-num'><div class='countbox-hours1'><span></span>0</div><div class='countbox-hours2'><span></span>0</div><div class='countbox-hours-text'></div></div>" +
        "<div class='countbox-space'></div>" +
        "<div class='countbox-num'><div class='countbox-mins1'><span></span>0</div><div class='countbox-mins2'><span></span>0</div><div class='countbox-mins-text'></div></div>" +
        "<div class='countbox-space'></div>" +
        "<div class='countbox-num'><div class='countbox-secs1'><span></span>0</div><div class='countbox-secs2'><span></span>0</div><div class='countbox-secs-text'></div></div>";
        document.getElementById("countbox1").innerHTML = out
        document.getElementById("countbox2").innerHTML = out
        document.getElementById("countbox3").innerHTML = out
    } else {
        days = 0;
        days1 = 0;
        days2 = 0;
        hours = 0;
        hours1 = 0;
        hours2 = 0;
        mins = 0;
        mins1 = 0;
        mins2 = 0;
        secs = 0;
        secs1 = 0;
        secs2 = 0;
        out = "";
        amount = Math.floor(amount / 1e3);
        days = Math.floor(amount / 86400);
        days1 = (days >= 10) ? days.toString().charAt(0) : '0';
        days2 = (days >= 10) ? days.toString().charAt(1) : days.toString().charAt(0);
        amount = amount % 86400;
        hours = Math.floor(amount / 3600);
        hours1 = (hours >= 10) ? hours.toString().charAt(0) : '0';
        hours2 = (hours >= 10) ? hours.toString().charAt(1) : hours.toString().charAt(0);
        amount = amount % 3600;
        mins = Math.floor(amount / 60);
        mins1 = (mins >= 10) ? mins.toString().charAt(0) : '0';
        mins2 = (mins >= 10) ? mins.toString().charAt(1) : mins.toString().charAt(0);
        amount = amount % 60;
        secs = Math.floor(amount);
        secs1 = (secs >= 10) ? secs.toString().charAt(0) : '0';
        secs2 = (secs >= 10) ? secs.toString().charAt(1) : secs.toString().charAt(0);
        out = "<div class='countbox-num'><div class='countbox-days1'><span></span>" + days1 + "</div><div class='countbox-days2'><span></span>" + days2 + "</div><div class='countbox-days-text'></div></div>" +
        "<div class='countbox-space'></div>" +
        "<div class='countbox-num'><div class='countbox-hours1'><span></span>" + hours1 + "</div><div class='countbox-hours2'><span></span>" + hours2 + "</div><div class='countbox-hours-text'></div></div>" +
        "<div class='countbox-space'></div>" +
        "<div class='countbox-num'><div class='countbox-mins1'><span></span>" + mins1 + "</div><div class='countbox-mins2'><span></span>" + mins2 + "</div><div class='countbox-mins-text'></div></div>" +
        "<div class='countbox-space'></div>" +
        "<div class='countbox-num'><div class='countbox-secs1'><span></span>" + secs1 + "</div><div class='countbox-secs2'><span></span>" + secs2 + "</div><div class='countbox-secs-text'></div></div>";
        $(".countbox").html(out);
        setTimeout("CountBox()", 1e3)
    }
}
month = --month;
dateFuture = new Date(year, month, day, hour, minute, sec);
window.onload = function () {
    CountBox()
}