t = TrafficLight(); b = Button(); es = [];

b.onclick(function () {

  t.red(); es.push(now());

  if (es.length == 6) report(); else start();

  });

start = function () {setTimeout(go, Math.random() * 3000)}

go = function () {t.green(); es.push(-now())};

div = function (a, b) {return Math.floor(a/b)};

report = function () {

  var ts = es.filter(not(pos)).zip(es.filter(pos), plus);

  print("Avg: " + div(ts.reduce(plus,0),ts.length) + "ms");

  print("Max: " + ts.reduce(max, 0) + "ms");

  };

start(); "Ready...";