import java.awt.*;

public class VonKoch
{
	public static void main( String []args ){
		Frame frm = new Frame("VonKoch");
		frm.setSize( 400, 200 );
		frm.setBackground( Color.lightGray );
		frm.show();
		VonKoch p = new VonKoch( frm );
		p.drawVonKoch( 8, p.width );
	}
	private Frame frm;
	private Graphics graphics;
	private int width;
	private int height;
	private double th, curx, cury;
	private final double PI = Math.PI;
	private final double m = 2*(1 + Math.cos(85 * PI/180));

	public VonKoch(Frame frm){
		graphics = frm.getGraphics();
		width = frm.getSize().width;
		height = frm.getSize().height;
	}
	
	void drawVonKoch( int n, double d ){
	    if( n == 0 ){
        	double x = curx + d * Math.cos(th * PI / 180);
        	double y = cury + d * Math.sin(th * PI / 180);
        	drawLineTo (x, y);
			return;
        }
		drawVonKoch( n - 1, d / m );
		th = th + 85;
		drawVonKoch( n - 1, d / m );
		th = th - 170;
		drawVonKoch( n - 1, d / m );
		th = th + 85;
		drawVonKoch( n - 1, d / m );
	}
	void drawLineTo( double x, double y ){
		graphics.drawLine( (int)curx, (int)cury, (int)x, (int)y );
		curx=x; 
		cury=y;
	}
	
}