Thumbnail interval hovers

// Aritst Card Hover Thumb Interval
  $('.artist-card.more-thumbs').each(function() {
    var
      thumb = '.image-thumb',
      $thumb = $(this).find('.image-thumb'),
      activeClass = 'thumb-active',
      activeSelector = '.thumb-active';
    $(this).mouseenter(function() {
      var $this = $(this);
      if ($this.find(activeSelector).next(thumb).length) {
        $this.find(activeSelector).removeClass(activeClass).next(thumb).addClass(activeClass);
      }
      else {
        $this.find(activeSelector).removeClass(activeClass);
        $thumb.first().addClass(activeClass);
      }
      cycleThumbs = setInterval( function() {
        var
          $activeThumb = $this.find('.thumb-active'),
          $next = $activeThumb.next(thumb);
        if ($next.length) {
          $activeThumb.removeClass(activeClass);
          $next.addClass(activeClass)
        }
        else {
          $activeThumb.removeClass(activeClass);
          $thumb.first().addClass(activeClass);
        }
      }, 1000);
      
    });

    $(this).mouseleave(function() {
      clearInterval(cycleThumbs);
    });
    
  });