First version of memory game

memory-game1.js

var five = require("johnny-five"),
  board, button;

board = new five.Board();

board.on("ready", function() {

  // Create a new `button` hardware instance.
  // This example allows the button module to
  // create a completely default instance
  button = new five.Button(2);

  // Inject the `button` hardware into
  // the Repl instance's context;
  // allows direct command line access
  // board.repl.inject({
  //   button: button
  // });

  // Button Event API

  // "down" the button is pressed
  button.on("down", function() {
    console.log("down");
  });

  // "hold" the button is pressed for specified time.
  //        defaults to 500ms (1/2 second)
  //        set
  button.on("hold", function() {
    console.log("hold");
  });

  // "up" the button is released
  button.on("up", function() {
    console.log("up");
  });
});

memory-game2.js

var five = require("johnny-five"),
  board, button1, button2;

board = new five.Board();

board.on("ready", function() {

  // Create a new `button` hardware instance.
  // This example allows the button module to
  // create a completely default instance
  button1 = new five.Button(2);
  button2 = new five.Button(4);

  // Inject the `button` hardware into
  // the Repl instance's context;
  // allows direct command line access
  // board.repl.inject({
  //   button: button
  // });

  // Button Event API

  // "down" the button is pressed
  button1.on("down", function() {
    console.log("down 1");
  });

  // "hold" the button is pressed for specified time.
  //        defaults to 500ms (1/2 second)
  //        set
  button1.on("hold", function() {
    console.log("hold 1");
  });

  // "up" the button is released
  button1.on("up", function() {
    console.log("up 1");
  });

  // "down" the button is pressed
  button2.on("down", function() {
    console.log("down 2");
  });

  // "hold" the button is pressed for specified time.
  //        defaults to 500ms (1/2 second)
  //        set
  button2.on("hold", function() {
    console.log("hold 2");
  });

  // "up" the button is released
  button2.on("up", function() {
    console.log("up 2");
  });
});