Make a time lapse on OS X

Screen.js

var count = 0;
var command;
var interval;
var directory = "~/Desktop/";

var sys = require('sys')
var exec = require('child_process').exec;
function puts(error, stdout, stderr) { sys.puts(stdout) }

function takeScreen() {
	command = "screencapture -x " + "~/Desktop/timelapse/screen" + count + ".jpg";
	count += 1;
	exec(command, puts);
}

if (process.argv.length < 3) {
	console.log("Using default settings");
	setInterval(function () {takeScreen()},interval);
} else {
	var noodle = parseFloat(process.argv[2]);
	console.log(noodle);
	setInterval(function () {takeScreen()},noodle);
}