$('.slider-for').slick({
slidesToShow: 1,
slidesToScroll: 1,
arrows: false,
fade: true,
asNavFor: '.slider-nav'
});
$('.slider-nav').slick({
slidesToShow: 7,
slidesToScroll: 1,
asNavFor: '.slider-for',
dots: true,
centerMode: true,
focusOnSelect: true
});