jQuery.fn.extend({
  rollNumber(num) {
    let $children = $(this).children()
    $children.addClass('roll-box').html(new Array(10).fill('0').map((_, i) => {
      return `<span class="roll-el">${i}</span>`
    }))
    function update(num) {
      let nums = num.toString().split("").reverse()
      Array.from($children).reverse().forEach((rollBox, i) => {
        $(rollBox).children().css('transform', `translateY(-${nums[i] || 0}00%)`)
      })
    }
    setTimeout(() => {
      update(num)
    }, 100)
    return update
  }
})