Shuriken Class
public class Shuriken extends Character
{
    static int move=0;
    /**
     * Act - do whatever the Shuriken wants to do. This method is called whenever
     * the 'Act' or 'Run' button gets pressed in the environment.
     */
    public void act() 
    {
        delete();
        hide();
        thrown();
        hurt();
    }    
    public Shuriken()
    {
        GreenfootImage image = getImage();  
        image.scale(30, 30);
        setImage(image); 
    }
    public void thrown()
    {
        MouseInfo mouse = Greenfoot.getMouseInfo();
       if(Greenfoot.mouseClicked(null))
       {
           move=1;
           setRotation(90);
           turnTowards(mouse.getX(), mouse.getY());
       }
       if(move==1)
       {
           move(5);
        }
       
    }
    public void delete()//deletes the shuriken if touching the world edge
    {
        if(getX()<10||getX()>590||getY()<10||getY()>390)
        {
            getWorld().removeObject(this);
            Character.shuriken=0;
        }
    }
    public void hide()//hides the shuriken from the start screen
    {
        if(MyWorld.screen==0)
        {
            getImage().setTransparency(0);
        }
        else
        {
            getImage().setTransparency(255);
        }
    }
    public void hurt()
    {
        if(isTouching(Boss.class))
        {
            getWorld().removeObject(this);
            Boss.bosshealth=Boss.bosshealth-1;
        }
    }
}

Character Class
public class Character extends Actor
{
    static int shuriken=0;
    /**
     * Act - do whatever the Character wants to do. This method is called whenever
     * the 'Act' or 'Run' button gets pressed in the environment.
     */
    public void act() 
    {
        run();
        threw();
        
    }    
    public void run()//allows character to move
    {
        if (Greenfoot.isKeyDown("a"))
        {
            move(-7);
        }
        if (Greenfoot.isKeyDown("d"))
        {
            move(7);
        }
    }
    public void threw()
    {
       MouseInfo mouse = Greenfoot.getMouseInfo();
       if (mouse==null)return;
       if(shuriken==0)
       {
       if(Greenfoot.mouseClicked(null))
       {
           getWorld().addObject(new Shuriken(), getX() , getY());
           shuriken=1;
       }
    }
    
    
    }
}

Boss Class
public class Boss extends Actor
{
    static int walltouch=0;
    static int bosshealth=10;
    /**
     * Act - do whatever the Boss wants to do. This method is called whenever
     * the 'Act' or 'Run' button gets pressed in the environment.
     */
    public void act() 
    {
        hide();
        fly();
        atWorldEdge();
        attack1(); 
    }  
    public void hide()//hides the boss from the start screen
    {
        if(MyWorld.screen==0)
        {
            getImage().setTransparency(0);
        }
        else
        {
            getImage().setTransparency(255);
        }
    }
    public void fly()//allows the boss to move around and use fire0
    {
        move(5);
        Fireball.loop1=1;
        if(atWorldEdge())
        {
            turn(180);
            getImage().mirrorVertically();
            walltouch++;
        }
        if(walltouch==6)
        {
            turnTowards(300,100);
            if(getX()==300 && getY()==100)
            {
            setRotation(0);
            move(5);
            walltouch=0;
            Fireball.loop1=1;
        }
        }
    }
    public boolean atWorldEdge()//checks to see if the boss is at world edge
    {
        if(getX() < 20 || getX() > getWorld().getWidth() - 20)
            return true;
        if(getY() < 20 || getY() > getWorld().getHeight() - 20)
            return true;
        else
            return false;
    }
    public void attack1() //movement for the first attack
    {
        if(walltouch==5 && getX()==300)
        {
            turnTowards(300, 400);
        }
        if(getX()==300 && getY()==240)
        {
        int i = 0;
        for (i=0; i<70; i++)
        {
           move(0);  
        }
        }
        }
}

Fireball Class
public class Fireball extends Boss
{
    private int loop0=0;
    static int loop1=0;
    
    /**
     * Act - do whatever the Fireball wants to do. This method is called whenever
     * the 'Act' or 'Run' button gets pressed in the environment.
     */
    public void act() 
    {
        hide();
        fire0();
        fire1();
        delete();
        //hurt();
    }    
    public Fireball()//sets the size of the fireball
    {
        GreenfootImage image = getImage();  
        image.scale(60, 60);
        setImage(image);
    }
    public void fire1()//attacks the character with 4 fireballs
    {
        Actor Boss = getWorld().getObjects(Boss.class).get(0);
        Actor Character = getWorld().getObjects(Character.class).get(0);
    if (Boss.getX()==300 && Boss.getY()==240)
    {
        getImage().setTransparency(255);
    }
    if(loop0==0)
    {
       turnTowards(Character.getX(), Character.getY());
       loop0=1;
    }
    move(5);
    }
    public void fire0()
    {
        Actor Boss = getWorld().getObjects(Boss.class).get(0);
        Actor Character = getWorld().getObjects(Character.class).get(0);
        loop1=0;
        if (loop1==1)
        {  
            turnTowards(Character.getX(), Character.getY());
            loop1=0;
        }
        move(5);
    }
    public void delete()
    {
        if(getX()<5||getX()>595||getY()<5||getY()>395)
        {
            getWorld().removeObject(this);
        }
        
    }
    
}