public class FractalTest {

    private List<Fractal> fractals = new ArrayList<>();
    private int count = 0;

    public final void run() {
        // Lambda Runnable
        for (int i = 0; i < 3; i++) {
            Runnable task = () -> { {
                try {
                    int left = 1;
                    int bottom = 2;
                    int right = 3;
                    Fractal fractal = new Fractal(left, bottom, right);
                    fractals.add(fractal);
                } finally {
                    tick();
                }
            }};
            // start the thread
            new Thread(task).start();
        }
    }

    public void tick() {
        count++;
        if (count == 3) drawFractals();
    }

    private void drawFractals() {
        fractals.forEach((fractal -> fractal.draw(canvas)));
    }


}

class Fractal {

    private final int left;
    private final int bottom;
    private final int right;


    public Fractal(int left, int bottom, int right) {
        this.left = left;
        this.bottom = bottom;
        this.right = right;
    }

    public int getLeft() {
        return left;
    }

    public int getBottom() {
        return bottom;
    }

    public int getRight() {
        return right;
    }

    public void draw(Canvas canvas) {
        //Method to draw the fractal on the canvas
    }

}