if(playerRedControlled == true)

if(playerRedControlled == false)

Red paddle = new Red();
paddle.playerRedControlled = true;;
addObject(paddle, // etc.

boolean playerRedControlled;
   /**
    * Act - do whatever the Red wants to do. This method is called whenever
    * the 'Act' or 'Run' button gets pressed in the environment.
    */
   public void act() 
   {
       checkKeypress(); // This statement calls the checkKeyPress method.
   }
   
   public void checkKeypress() // This method controls the movement of the Red player.
   {
        Actor pongball = getWorld().getObjects(PongBall.class).get(0);
        if(pongball.getX() > 615)
        {
             // if(getY() > pongball.getY())
             // {
                 // if(Greenfoot.getRandomNumber(5) != 0)
                 // {
                     // setLocation(getX(),getY() - 10); 
                 // }
                 // else if(Greenfoot.getRandomNumber(5) == 0)
                 // {
                     // setLocation(getX(),getY() - 5); 
                 // }
             // }
             // else if(getY() < pongball.getY())
             // {
                 // if(Greenfoot.getRandomNumber(5) != 0)
                 // {
                     // setLocation(getX(),getY() + 10); 
                 // }
                 // else if(Greenfoot.getRandomNumber(5) == 0)
                 // {
                     // setLocation(getX(),getY() + 5); 
                 // }
                // }
      
             if(playerRedControlled == true)
             {                
                 if (Greenfoot.isKeyDown("up")) // Pressing the up arrow key will move the red paddle up.
                 {       
                     setLocation(getX(),getY() - 10);
                     System.out.println("UP");
                 }
                 else if (Greenfoot.isKeyDown("down")) // Pressing the down arrow key will move the red paddle down. 
                 {
                     setLocation(getX(),getY() + 10);
                     System.out.println("Down");
                 }
             }
             else if(playerRedControlled == false)
             {
                 if(getY() > pongball.getY())
                 {
                     if(Greenfoot.getRandomNumber(5) != 0)
                     {
                         setLocation(getX(),getY() - 10); 
                     }
                     else if(Greenfoot.getRandomNumber(5) == 0)
                     {
                         setLocation(getX(),getY() - 5); 
                     }
                 }
                 else if(getY() < pongball.getY())
                 {
                     if(Greenfoot.getRandomNumber(5) != 0)
                     {
                          setLocation(getX(),getY() + 10); 
                     }
                     else if(Greenfoot.getRandomNumber(5) == 0)
                     {
                          setLocation(getX(),getY() + 5); 
                     }
                 }
             }
             BorderCheck();      // This statement calls the BorderCheck method
        }
    }

GreenfootSound sound1 = new GreenfootSound("Sound_1.mp3"); 
    GreenfootSound sound2 = new GreenfootSound("Sound_2.mp3");
    GreenfootSound sound3 = new GreenfootSound("Sound_3.mp3");
    GreenfootSound sound4 = new GreenfootSound("Sound_4.wav");  
    PongBall pongBall = new PongBall();    
    BlueScore blueScore = new BlueScore();
    RedScore redScore = new RedScore();
    GameOverScreen gameOver = new GameOverScreen();   
    int blueNumber = 0; // This statement sets the initial score for Blue, to 0.
    int redNumber = 0; // This statement sets the initial score for Red, to 0.
    int g = 0;
    int directionPicker;
    int red;
    int blue;
    /**
     * Constructor for objects of class PongCourt.
     */
    public PongCourt()
    {    
        super(1080, 600, 1); // Create a new world with 1080x600 cells with a cell size of 1x1 pixels.
        addObject(new TopWall(),540,0); // Create a Top Wall for the ball to ricohet off.
        addObject(new BottomWall(),540,600);  // Create a Bottom Wall for the ball to ricohet off.
        
        // if(blue == 0)
        // {
            // Blue bluePaddle = new Blue();
            // bluePaddle.playerBlueControlled = false;
            // addObject(bluePaddle,5,getHeight()/2); // Create a new Blue player in a certain spot in the world. 
        // }
        // else if(blue == 1)
        // {
            // Blue bluePaddle = new Blue();
            // bluePaddle.playerBlueControlled = true;
            // addObject(bluePaddle,5,getHeight()/2); // Create a new Blue player in a certain spot in the world. 
        // }
        
        if(red == 0)
        {
            Red redPaddle = new Red();
            redPaddle.playerRedControlled = false;
            addObject(redPaddle,1075,getHeight()/2); // Create a new Red player in a certain spot in the world. 
        }
        else if(red == 1)
        {
            Red redPaddle = new Red();
            redPaddle.playerRedControlled = true;
            addObject(redPaddle,1075,getHeight()/2); // Create a new Red player in a certain spot in the world. 
        }
        
        // Red redPaddle = new Red();
        // redPaddle.playerRedControlled = true;
        // addObject(redPaddle,1075,getHeight()/2); // Create a new Red player in a certain spot in the world.    
        
        
        addObject(new GameOverScreen(),getWidth()/2, getHeight()/2); // Create a Halfway line to indicate each player's half. 
                                                                     //Create a gameOver object in the world as an anchor point for the GameOver screen.                                                                 
        addObject(new LeftGoal(),0,300); // Create a Goal that Blue has to defend, against Red attacking.
        addObject(new RightGoal(),1080,300); // Create a Goal that Red has to defend, against Blue attacking.            
        addObject(blueScore,getWidth()/2-75,60); // Create a Scoreboard to keep track of Blue's score.
        addObject(redScore,getWidth()/2+75,60); // Create a Scoreboard to keep track of Red's score.       
        NewBall(); // Call the NewBall method to create a new ball after a goal is scored.        
        Greenfoot.setSpeed(100); // Set the speed of the Greenfoot scenario.
    }
          
    public String NumberToFilenameBlue(int number) // A method that will turn the number of goals scored by Blue into a string to build a filename
    {
       return ("Score_" + String.valueOf(number) + "blue.png"); // Turn the number of goals scored into a phrase that will call an image.
    }   
   
    public String NumberToFilenameRed(int number) // A method that will turn the number of goals scored by Red into a string to build a filename
    {
       return ("Score_" + String.valueOf(number) + "red.png"); // Turn the number of goals scored into a phrase that will call an image.
    }       
   
    public void DisplayScoreBlue(int number, Actor score) // A method that will display the number of goals scored by Blue as an image
    {
       String filename = NumberToFilenameBlue(number); // Display an image of the score through either the blueScore or redScore actors.
       score.setImage(filename);                   // Set the image for the score to match the number of goals scored for each player.
    }
   
    public void DisplayScoreRed(int number, Actor score)  // A method that will display the number of goals scored by Red as an image
    {
       String filename = NumberToFilenameRed(number); // Display an image of the score through either the blueScore or redScore actors.
       score.setImage(filename);                   // Set the image for the score to match the number of goals scored for each player.
    }
   
    public void IncrementBlueScore() // This method increases the the score for Blue when the ball goes in the Right Goal.
    {
       blueNumber++;                               // Increments the variable blueNumber
       DisplayScoreBlue(blueNumber, blueScore);    // Displays the score for Blue
       if (blueNumber >= 9) //insert maximum score here
       {
            GreenfootImage winner = new GreenfootImage("GameOverBlueWins.png");         // This method attaches GameOverBlueWins.png to the variable winner.
            gameOver.setImage(winner);                                                  // This method sets the image variable winner to the variable gameOver.
            addObject(new BlueWins(),getWidth()/2, getHeight()/2);                      // Creates an object of class BlueWins in the middle of the screen          
            GameOver();                                                                 // This statement calls the GameOver method
       }
       else 
       {
            NewBall();                                              // This statment calls the NewBall method
            g++;                                                    // Increments the vairable g
            directionPicker = Greenfoot.getRandomNumber(3);         // Assigns a random number to the variable directionPicker
       }
    }
   
    public void IncrementRedScore() // This method increases the the score for Red when the ball goes in the Left Goal.
    {
       redNumber++;                                 // Increments the variable redNumber
       DisplayScoreRed(redNumber, redScore);        // Displays the score for Red
       if (redNumber >= 9) //insert maximum score here
       {
            GreenfootImage winner = new GreenfootImage("GameOverRedWins.png");  // This method attaches GameOverRedWins.png to the variable winner.
            gameOver.setImage(winner);                                          // This method sets the image variable winner to the variable gameOver.
            addObject(new RedWins(),getWidth()/2, getHeight()/2);               // Creates an object of class RedWins in the middle of the screen
            GameOver();                                                         // This statement calls the GameOver method
       }
       else
       {
           NewBall();                                              // This statment calls the NewBall method
           g++;                                                    // Increments the variable g
           directionPicker = Greenfoot.getRandomNumber(3);         // Assigns a random number to the variable directionPicker
       }
    }
   
    public void NewBall() // This method creates a new ball in the center of the world when the ball enters a goal.
    {
       pongBall = new PongBall(); 
       if(g % 2 == 0)                                               // This if statement changes the vSpeed of the ball depending on the value of the variable g
       {
           pongBall.vSpeed = Greenfoot.getRandomNumber(10) + 5;
       }
       addObject(pongBall,getWidth()/2, getHeight()/2);             // Creates an object of class PongBall in the middle of the screen                    
    }
   
    public void GameOver() // This method stops the Greenfoot scenario.
    {
       if(sound1.isPlaying())                   // This statement checks to see if sound1 is playing
       {
           sound1.stop();                       // If sound1 is playing, then it will stop
       }
       else if(sound2.isPlaying())              // This statement checks to see if sound2 is playing
       {
           sound2.stop();                       // If sound2 is playing, then it will stop
       }
       else if(sound3.isPlaying())              // This statement checks to see if sound3 is playing
       {
           sound3.stop();                       // If sound3 is playing, then it will stop
       }
       else if(sound4.isPlaying())              // This statement checks to see if sound4 is playing
       {
           sound4.stop();                       // If sound4 is playing, then it will stop
       }
       Greenfoot.playSound("GAME_OVER.wav");    // Plays the sound file Game_Over.wav
       Greenfoot.stop();                        // Stops the greenfoot scenario
    }