append () {
      const { items } = this
      const { wrapper, slides } = Components.Html

      const half = Math.floor(items.length / 2)
      const prepend = items.slice(0, half).reverse()
      const append = items.slice(half * -1).reverse()
      const width = `${Components.Sizes.slideWidth}px`

      for (let i = 0; i < append.length; i++) {
        wrapper.appendChild(append[i])
      }

      for (let i = 0; i < prepend.length; i++) {
        wrapper.insertBefore(prepend[i], slides[0])
      }

      for (let i = 0; i < items.length; i++) {
        items[i].style.width = width
      }
    }
Append cloned slides with generated pattern.

@return {Void}