Three level deep menu for Shopify using linklists

three-level-menu.liquid

<ul>
	<li><a href="/collections/all">Products</a>
		{% if linklists.main-menu.size > 0 %}
			<ul>
				{% for link in linklists.main-menu.links %}
					<li>{{ link.title | link_to: link.url }}</li>
				{% endfor %}
			</ul>
		{% endif %}
	</li>
	{% if linklists.main-menu.size > 0 %}
	{% for link in linklists.main-menu.links %}
	<li>{{ link.title | link_to: link.url }}
		{% assign child_list_handle = link.title | handle %}
		{% if linklists[child_list_handle] and linklists[child_list_handle].links.size > 0 %}
		<ul>
			{% for l in linklists[child_list_handle].links %}
				<li>{{ l.title | link_to: l.url }}
					{% assign grandchild_list_handle = l.title | handle %}
					{% if linklists[grandchild_list_handle] and linklists[grandchild_list_handle].links.size > 0 %}
					<ul>
						{% for grand_link in linklists[grandchild_list_handle].links %}
							<li>{{ grand_link.title | link_to: grand_link.url }}</li>
						{% endfor %}
					</ul>
					{% endif %}
				</li>
			{% endfor %}
		</ul>
		{% endif %}
	</li>	
	{% endfor %}
	{% endif %}
</ul>

how can I use this and how can I go deeper then 3?