Pre-Game Countdown

long startTime = System.currentTimeMillis();
while (startTime + 3000 < System.currentTimeMillis());

import greenfoot.*;  // (World, Actor, GreenfootImage, Greenfoot and MouseInfo)

/**
 * Write a description of class Space here.
 * 
 * @Juwan Wood 
 * @Project Bravo
 */
public class Space extends World
{
    private Player1 P1;
    Score scoreCounter = new Score("Score: ");
    GameOver got = new GameOver();
    private People actor;
    boolean chosen;
    boolean ready = false;
    /**
     * Constructor for objects of class Space.
     * 
     */
    public Space()
    {    
        // Create a new world with 600x400 cells with a cell size of 1x1 pixels.
        super(1000, 500, 1); 
        
        choosePlayer();
    }
    public void act()
    {
        if ( chosen == true )
        {
            getReady();
        }
        if ( ready == true )
        {
            reset();
        }
    }
    public void reset()
    {        
        addObject(actor, 500, 200);
        addRocks();
        addObject(scoreCounter,(getHeight() / 2), 480);    
        music.playLoop(); 
        ready = false;
    }
    public void choosePlayer()
    {
        addObject(new Stewie(), 330, 250);
        addObject(new Homer(), 660, 250);
    }
    public void chosenStewie()
    {
        actor = new Player1();
        chosen = true;
    }
    public void chosenHomer()
    {
        actor = new Player2();
        chosen = true;
    }
    public void getReady()
    {
        chosen = false;
        if (ready == false)
        {
            long startTime = System.currentTimeMillis();  
            while (startTime + 3000 < System.currentTimeMillis()); 
            ready = true;
        }
    }
}