newby-jay

<style>
  html, body { margin: 0; padding: 0;}
</style>
<canvas id="canvas"></canvas>
<script src="http://d3js.org/d3.v3.min.js"></script>
<script>
var num = 1e4;
var canvas = document.getElementById("canvas");
var width = canvas.width = 960;
var height = canvas.height = 500;

newby-jay

(function () {
    var canvas = document.getElementById("canvas"),
	width = canvas.width = 960,
	height = canvas.height = 500,
	g = canvas.getContext("2d");
    var	reactionRadius2 = 2,
	alpha = 0.007, // fraction of A molecules made per step
	gamma = alpha/1.5, // fraction of B molecules that decay per step
	randIC = function (i) {
	    return [width*Math.random(), height*Math.random()];