Donuts - by Mattia Larentis (@SpiritualGuru)

Donuts

<div class="donut donut-big">
    <div class="donut-arrow" data-percentage="10"></div>
</div>
<div class="donut">
    <div class="donut-arrow" data-percentage="30"></div>
</div>
<div class="donut donut">
    <div class="donut-arrow" data-percentage="60"></div>
</div>
<div class="donut donut-small">
    <div class="donut-arrow" data-percentage="90"></div>
</div>

$('#myButton').on('click', function () {
   $('#myDonut').find('.donut-arrow').trigger('updatePercentage', Math.floor((Math.random()*100)))
});