Run this example from the command line with:
node eg/button-EVS_NXT.js
var five = require("johnny-five");
var board = new five.Board();
board.on("ready", function() {
  var leda = new five.Led(10);
  var ledb = new five.Led(11);
  var BAS1 = new five.Button({
    controller: "EVS_NXT",
    pin: "BAS1"
  });
  var BBS1 = new five.Button({
    controller: "EVS_NXT",
    pin: "BBS1"
  });
  BAS1.on("down", function(value) {
    leda.on();
  });
  BAS1.on("hold", function() {
    leda.blink(500);
  });
  BAS1.on("up", function() {
    leda.stop().off();
  });
  BBS1.on("down", function(value) {
    ledb.on();
  });
  BBS1.on("hold", function() {
    ledb.blink(500);
  });
  BBS1.on("up", function() {
    ledb.stop().off();
  });
});