A Pen by Calvin Metcalf.

<ul>

  <li class='waiter'><span id="value1">0</span><button id="button1">increment</button>

  <li class='waiter'><span id="value2">0</span><button id="button2">increment</button>

    <li class='waiter'><span id="value3">0</span><button id="button3">increment</button>

      <li class='waiter'><span id="value4">0</span><button id="button4">incriment</button>

</ul>