code: function start(name) {
    var orb = spheros[name],
        contacts = 0,
        age = 0,
        alive = false;
  
    orb.detectCollisions();
  
    born();
  
    orb.on("collision", function() { contacts += 1; });
  
    setInterval(function() { if (alive) { move(); } }, 3000);
    setInterval(birthday, 10000);
  
    // roll Sphero in a random direction
    function move() {
      orb.roll(60, Math.floor(Math.random() * 360));
    }
  
    // stop Sphero
    function stop() {
      orb.stop();
    }
  
    // set Sphero's color
    function color(str) {
      orb.color(str);
    }
  
    function born() {
      contacts = 0;
      age = 0;
      life();
      move();
    }
  
    function life() {
      alive = true;
      color("green");
    }
  
    function death() {
      alive = false;
      color("red");
      stop();
    }
  
    function enoughContacts() {
      return contacts >= 2 && contacts < 7;
    }
  
    function birthday() {
      age += 1;
  
      if (alive) {
        console.log("Happy birthday,", name);
        console.log("You are", age, "and had", contacts, "contacts.");
      }
  
      if (enoughContacts()) {
        if (!alive) { born(); }
      } else {
        death();
      }
    }
  }
docs: tells each Sphero what to do