firethis script for owl carousel

firethis.js

jQuery(document).ready(function ($) {
    $('.owl-carousel').owlCarousel({
        navText:['\43','\44'],
        dots: false,
        loop: true,
        nav: true,
        lazyload: true,
        margin: 50,
        responsiveClass: true,
        responsive: {
            0: {
                items: 1,
                nav: false,
                dots: true,
            },
            600: {
                items: 3
            },
            1000: {
                items: 4
            }
        }
    })
});