decayModel.js

var decay = function(initial, chance) {
	var numDecayed = 0;
	for (var i = 0; i < initial; i++) {
		if (Math.random() < chance) {
			numDecayed++
		}
	}
	return numDecayed;
}

var simulate = function(initial, chance, n) {
	var numLeft = initial;
	for (var i = 0; i < n; i++) {
		numLeft -= decay(numLeft, chance);
	}
	return numLeft
}
var decayModel = function(initial, chance) {
	var numLeft = initial;
	var results = [];
	while (numLeft > 0) {
		numLeft -= decay(numLeft, chance);
		results.push(numLeft);
	}
	return results;
}