How to devide items into sections with array.slice method

items_template.html

<!-- I want to devide this itemList in to 3 sections. Each section should contain max 2 items.

#Section 1
<li>1</li>
<li>2</li>

#Section 2
<li>3</li>
<li>4</li>

#Section 3
<li>5</li>

-->
<ul>
  <li>1</li>
  <li>2</li>
  <li>3</li>
  <li>4</li>
  <li>5</li>
</ul>

items_to_section_method.js

jQuery(function () {
    var totalItems = jQuery("li").size();
    var itemsPerPage = 2;
    var sectionsCount = Math.ceil(totalItems / itemsPerPage);
    for (var i = 0; i < sectionsCount; i++) {
        var color = '#' + Math.floor(Math.random() * 16777215).toString(16);
        jQuery("li")
        .slice(i * itemsPerPage, itemsPerPage + i * itemsPerPage)
        .each(function (index, li) {
            jQuery(this).css({
                background: color
            });
        });
    }
});