import gpdraw.*;

public class KochCurve {
    private DrawingTool pen;
    private SketchPad paper;

    public KochCurve(){
        paper = new SketchPad(500,500);
        pen = new DrawingTool(paper);
    }

    public void drawKochCurve(int level, int length) {
        if (level < 1)
            pen.forward(length);
        else {
            drawKochCurve(level - 1, length / 3);
            pen.turnLeft(60);
            drawKochCurve(level - 1, length / 3);
            pen.turnRight(120);
            drawKochCurve(level - 1, length / 3);
            pen.turnLeft(60);
            drawKochCurve(level - 1, length / 3);
        }
    }

    public static void main(String[] args) {
        KochCurve curve = new KochCurve();
        curve.drawKochCurve(6,300);
    }
}