based off of by Chris Minnick and Eva Holland.
Based on Fireworks by dtrooper. (http://jsfiddle.net/dtrooper/AceJJ/)
Forked from http://jsfiddle.net/triptych/PYaDq/light/
Based on Animated CSS Fire Demo by sidonaldson (http://jsfiddle.net/sidonaldson/NBD9t/light/)
based on 'bubbles' by Anthony Pipkin (http://jsfiddle.net/apipkin/qUTwQ/light/)