$("#slowbutton").click(function(){

 $('.marquee-logo').slick('unslick');

 $('.marquee-logo').slick({
  autoplay: true,
  infinite: true,
  autoplaySpeed: 0,
  slidesToScroll: 1,
  slidesToShow: 5,
  arrows: false,
  cssEase: 'linear',
  speed: 10000,
  initialSlide: 1,
  draggable: false,
  });

$("#nextbutton").click(function(){
 $('.marquee-logo').slick('unslick');

 $('.marquee-logo').slick({
  autoplay: true,
  infinite: true,
  autoplaySpeed: 0,
  slidesToScroll: 1,
  slidesToShow: 5,
  arrows: false,
  cssEase: 'linear',
  speed: 300,
  initialSlide: 1,
  draggable: false,
  });
});