Naereen

// Source https://codepen.io/juliangarnier/pen/gmOwJX
// (C) Julian Garnier
// Adapted by Lilian Besson (Naereen) https://github.com/Naereen
// to add a fireworks effect on a reveal.js slideshows

var canvasEl = document.querySelector('.fireworks');
var ctx = canvasEl.getContext('2d');
var numberOfParticules = 40;
var pointerX = 0;
var pointerY = 0;