less iterator loop

gistfile1.txt

<ul>
	<li class="item-1"></li>
	<li class="item-2"></li>
	<li class="item-3"></li>
	<li class="item-4"></li>
	<li class="item-5"></li>
</ul>	

li{
  background-color: red;
  width: 10%;
}

@loopLength: 5;

.mixin-width (@i) when (@i > 0){
  li:nth-child(@{i}){
    width: @i+0%;
  }
  .mixin-width(@i - 1);
}

.mixin-width(@loopLength);