public class Ball extends Actor
{
    Player_1 p1;
    Player_2 p2;
    MyWorld world;
    
    int x;
    int y;
    int ySpeed;
    int xSpeed;
    /**
     * Act - do whatever the Ball wants to do. This method is called whenever
     * the 'Act' or 'Run' button gets pressed in the environment.
     */
    public void act() 
    {
        x = getX();
        y = getY();
        xSpeed = 5;
        ySpeed = 5;
        
        setLocation(x + xSpeed, y + ySpeed);
        
        if(getX() < 10 || getX() > getWorld().getWidth() - 10) {
            xSpeed = -xSpeed;
        }
        if(getY() < 10 || getY() > getWorld().getHeight() - 10) {
            ySpeed = -ySpeed;
        }
    }
}