var secondes = Math.floor((Math.random() * 10) + 3);
var duration = secondes;
$('#activity-popup-dialog-body').find('.not-following').find('button.follow-button').each(function() {
    var _this = this;

    setTimeout(function() {
    $(_this).trigger('click');
    }, duration * 1000);

    duration += secondes;
});