$('.slider-nav').slick({
  slidesToShow: 4,
  slidesToScroll: 1,
  asNavFor: '.slider-for',
  dots: false,
  vertical: true,
  verticalSwiping:true,
  arrows: true,
  focusOnSelect: true,
  responsive: [
    {
      breakpoint: 767,
      settings: "unslick"
    }
  ]
});