How to reset the countdown timer

Hi, first of all, thanks for the support and the beautiful job !

I want to reset the countdown timer when it is finished. Or add a new date once it has finished automatically. Is it possible ?

Hi, I want to reset the countdown when it is finished. Or add a new date once it has finished automatically. Is it possible ?

Thanks :

jQuery(document).ready( function($){
    var currentDate = new Date();
    currentDate.setSeconds(currentDate.getSeconds() + 5);
    $('#countdown-ex1').countdown({
        until: currentDate,
        onExpiry: function(){
            currentDate = new Date();
            currentDate.setSeconds(currentDate.getSeconds() + 5);
            $('#countdown-ex1').countdown('option', {until: currentDate});
        }
    });
});