import java.io.*;

public class SierpinskiSquareCurve {
    public static void main(final String[] args) {
        try (Writer writer = new BufferedWriter(new FileWriter("sierpinski_square.svg"))) {
            SierpinskiSquareCurve s = new SierpinskiSquareCurve(writer);
            int size = 635, length = 5;
            s.currentAngle = 0;
            s.currentX = (size - length)/2;
            s.currentY = length;
            s.lineLength = length;
            s.begin(size);
            s.execute(rewrite(5));
            s.end();
        } catch (final Exception ex) {
            ex.printStackTrace();
        }
    }

    private SierpinskiSquareCurve(final Writer writer) {
        this.writer = writer;
    }

    private void begin(final int size) throws IOException {
        write("<svg xmlns='http: