var swiper = new Swiper('.swiper-container', {
      slidesPerView: 3,
      spaceBetween: 15,
      slidesPerGroup: 1,
      loop: true,
      autoplay:true,
      loopFillGroupWithBlank: true,
      navigation: {
        nextEl: '.swiper-button-next',
        prevEl: '.swiper-button-prev',
      },
     breakpoints: {
        641: {
          slidesPerView: 1,
          spaceBetween: 0,
        },
        769: {
          slidesPerView: 3,
          spaceBetween: 10,
        },
        1024: {
          slidesPerView: 3,
          spaceBetween: 20,
        },
      }
    });