text: const Game = require('./game.js');
  const aiRandom = require('./ai-random.js');
  const aiNn = require('./ai-nn.js');
  
  const options = {
    ais: [aiRandom, aiNn],
    displayFunction: function(state) {
      function beautifyCell(cell) {
        return cell || ' ';
      }
  
      console.log('=====');
      console.log(beautifyCell(state.field[0]), beautifyCell(state.field[1]), beautifyCell(state.field[2]));
      console.log(beautifyCell(state.field[3]), beautifyCell(state.field[4]), beautifyCell(state.field[5]));
      console.log(beautifyCell(state.field[6]), beautifyCell(state.field[7]), beautifyCell(state.field[8]));
    },
  };
  
  var game = new Game(options);
  
  game.run((error, result) => {
    console.log(`The winner is: ${result}`);
  });
  