This code draws a box fractal (http://mathworld.wolfram.com/BoxFractal.html)

Fractal.groovy

// Michael Detmold
//A program that draws a box fractal
import org.learninggroovy.graphicswindow.GraphicsWindow
	import java.awt.*
	window = GraphicsWindow.getBlankWindow(700,700)


	def ss = 5,dims = 670
	def sx =ss,sy =ss
	ite = 7

	fract(sx,sy,dims,0)

def fract(x, y, side, i){ 

	if(i==ite){

	}else{

		int smallSide = side/3
			int count = i

			count++  

			//ul = "upper left"
		fract(x,y,smallSide,count)
			//ur
		fract(x+(smallSide*2),y,smallSide,count)
			//ll
		fract(x,y+(smallSide*2),smallSide,count)
			//lr
		fract(x+(smallSide*2),y+(smallSide*2),smallSide,count)   
			//cent
		fract(x+(smallSide),y+(smallSide),smallSide,count)

		if(i== ite-1){    //ensures only the smalles squares are drawn
		window.draw { g->
			g.drawRect(x,y,side,side)

		}
	}
}
}