Level2.java

    import greenfoot.*;
import java.util.ArrayList;

public class Level2 extends World {
    private GreenfootImage bg;
    private GreenfootSound backgroundMusic;
    private int roomWidth = 700;
    private int roomHeight = 700;
    private Player player;
    private HealthBar healthBar;
    private Actor timeDisplay;
    private Actor countdownDisplay;
    private long startTime;
    private static final int GAME_TIME_LIMIT = 50 * 1000;
    private int remainingTime;
    private int Zombie4Count = 0, maxZombie4s = 7;
    private int zombie2Count = 0, maxZombie2s = 7;
    private int greatswordZombie4Count = 0, maxGreatswordZombie4s = 5;
    private int zombie3Count = 0, maxZombie3s = 4;
    private long lastSpawnTime = 0;
    private int spawnInterval = 2000;
    private ArrayList<int[]> portalPositions;

    private boolean gameStarted = false;
    private int delayCounter = 3 * 60; 

    public Level2() {
        super(700, 700, 1, false);
        bg = new GreenfootImage("bg2.png");
        setBackground(bg);

        backgroundMusic = new GreenfootSound("backsound.mp3");
        backgroundMusic.playLoop();

        player = new Player();
        addObject(player, roomWidth / 2, roomHeight / 2);

        healthBar = new HealthBar(player.getMaxHealth());
        addObject(healthBar, 130, 50);

        portalPositions = new ArrayList<>();
        addPortal(350, 30);
        addPortal(50, 350);
        addPortal(650, 350);
        addPortal(350, 670);

        timeDisplay = new Actor() {
            public void act() {
                if (gameStarted) updateTimeDisplay();
            }
        };
        addObject(timeDisplay, 150, 30);

countdownDisplay = new Actor() { public void act() {} };
        addObject(countdownDisplay, roomWidth / 2, 150);
        updateCountdownDisplay();
    }

    private void addPortal(int x, int y) {
        Portal portal = new Portal();
        addObject(portal, x, y);
        if (y < 100 || y > 600) portal.setRotation(90);
        portalPositions.add(new int[]{x, y});
    }

    public void act() {
        if (!gameStarted) {
            if (delayCounter > 0) {
                delayCounter--;
                updateCountdownDisplay();
            } else {
                removeObject(countdownDisplay);
                startGame();
            }
            return;
        }

        if (player == null) return;
        if (player.getHealth() <= 0 || player.isDead()) {
            gameOver();
            return;
        }
        if (System.currentTimeMillis() - startTime >= GAME_TIME_LIMIT) {
            victory();
            return;
        }

        healthBar.updateHealth(player.getHealth());
        remainingTime = (int) ((GAME_TIME_LIMIT - (System.currentTimeMillis() - startTime)) / 1000);
        updateTimeDisplay();
        spawnEnemiesGradually();
    }

    private void startGame() {
        gameStarted = true;
        startTime = System.currentTimeMillis();
    }

  private void updateCountdownDisplay() {
    int seconds = (int) Math.ceil((double) delayCounter / 60.0);
    String text = seconds > 0 ? "Level 2 dimulai dalam: " + seconds : "";

    GreenfootImage img = new GreenfootImage(roomWidth, roomHeight);
    Font font = new Font("Monospaced", true, false, 40);
    img.setFont(font);

    GreenfootImage textImg = new GreenfootImage(text, 40, Color.RED, new Color(0, 0, 0, 0));

    int x = (img.getWidth() - textImg.getWidth()) / 2 - 10; 
    int y = (img.getHeight() - textImg.getHeight()) / 2;

    img.drawImage(textImg, x, y);
    countdownDisplay.setImage(img);
}


    private void spawnEnemiesGradually() {
        long now = System.currentTimeMillis();
        if (now - lastSpawnTime >= spawnInterval) {
            int type = Greenfoot.getRandomNumber(4);
            switch (type) {
                case 0:
                    if (Zombie4Count < maxZombie4s) summonZombie4();
                    break;
                case 1:
                    if (zombie2Count < maxZombie2s) summonZombie2();
                    break;
                case 2:
                    if (greatswordZombie4Count < maxGreatswordZombie4s) summonGreatswordZombie4();
                    break;
                case 3:
                    if (zombie3Count < maxZombie3s) summonZombie3();
                    break;
            }
            lastSpawnTime = now;
        }
    }

    public void stopped() {
        if (backgroundMusic != null) backgroundMusic.stop();
    }

    public void started() {
        if (backgroundMusic != null && !backgroundMusic.isPlaying()) backgroundMusic.playLoop();
    }

    private void gameOver() {
        backgroundMusic.stop();
        Greenfoot.setWorld(new GameOver());
    }

    private void victory() {
        backgroundMusic.stop();
        Greenfoot.setWorld(new Level3());
    }

    private void summonZombie4() {
        Zombie4 s = new Zombie4();
        int[] pos = portalPositions.get(Greenfoot.getRandomNumber(portalPositions.size()));
        addObject(s, pos[0], pos[1]);
        Zombie4Count++;
    }

    private void summonZombie2() {
        Zombie2 z = new Zombie2();
        int[] pos = portalPositions.get(Greenfoot.getRandomNumber(portalPositions.size()));
        addObject(z, pos[0], pos[1]);
        zombie2Count++;
    }

    private void summonGreatswordZombie4() {
        Zombie1 g = new Zombie1();
        int[] pos = portalPositions.get(Greenfoot.getRandomNumber(portalPositions.size()));
        addObject(g, pos[0], pos[1]);
        greatswordZombie4Count++;
    }

    private void summonZombie3() {
        Zombie3 r = new Zombie3();
        int[] pos = portalPositions.get(Greenfoot.getRandomNumber(portalPositions.size()));
        addObject(r, pos[0], pos[1]);
        zombie3Count++;
    }

    public void decreaseZombie4Count() { Zombie4Count--; }
    public void decreaseZombie2Count() { zombie2Count--; }
    public void decreaseGreatswordZombie4Count() { greatswordZombie4Count--; }
    public void decreaseZombie3Count() { zombie3Count--; }

    private void updateTimeDisplay() {
        GreenfootImage img = new GreenfootImage(220, 50);
        img.setColor(Color.WHITE);
        img.setFont(new Font(true, false, 20));
        img.drawString("Time: " + remainingTime + "s", 10, 30);
        timeDisplay.setImage(img);
    }
}