application-3.js

function startGame() {
  let seconds = 4; // Number of seconds + 1 to wait
  
  // Start a countdown timer
  const intervalId = setInterval(function() {
    // Subtract the number of seconds left and update UI
    seconds--;
    countdownMessage(true, seconds);
    
    if (seconds == 0) { // It's time to start the game!
      clearInterval(intervalId); // Stop the countdown
      countdownMessage(false, 0); // Hide the countdown message
      
      if (remoteGame != null && localGame != null) {
        localGame.restart(); // A game already exists, lets just reset the game.
      } else {
        // Start the game managers
        remoteGame.setup();
        localGame.setup();
      }
      
    }
  }, 1000);
}