New to Java

Hello folks,
I've posted my question at this forum as well but since I got no response so far I've decided to post in this community here. Hopefully somebody has an idea or suggestion to my problem.

I am trying to make a program that produces some recursive squares as shown here

public class RecursiveSquares {
	
	static void drawSquare(double x, double y, double size){
			
                        // Using Cartesian coordinate system, where 
                        // (x0, y0) is the lower left corner 
                        // and (x1,y1) is the upper right corner		
			double x0 = x/2;  
			double y0 = y/2;
			double x1 = x + x/2;
			double y1 = y + y/2;
			size = size/2.2;
			
                        // I am using pre-written class StdDraw
			StdDraw.setPenColor(StdDraw.GRAY);
			StdDraw.filledSquare(x0, y1, size);
						
			StdDraw.setPenColor(StdDraw.BLACK);
			StdDraw.square(x0, y1, size);
			
			StdDraw.setPenColor(StdDraw.GRAY);
			StdDraw.filledSquare(x1, y1, size);
						
			StdDraw.setPenColor(StdDraw.BLACK);
			StdDraw.square(x1, y1, size);
			
			StdDraw.setPenColor(StdDraw.GRAY);
			StdDraw.filledSquare(x1, y0, size);
						
			StdDraw.setPenColor(StdDraw.BLACK);
			StdDraw.square(x1, y0, size);
			
			StdDraw.setPenColor(StdDraw.GRAY);
			StdDraw.filledSquare(x0, y0, size);
						
			StdDraw.setPenColor(StdDraw.BLACK);
			StdDraw.square(x0, y0, size);
			
		}
	
	static void draw(int n, double x, double y, double size){
		if(n==0){
			return;
		}
		else{
			drawSquare(x,y,size);
			                                                 
			double x0 = x/2;                        
			double y0 = y/2;                                                           
			double x1 = x + x/2;                                                      
			double y1 = y + y/2;                                                    
			size = size/2.2;                                                           
			                                                                             
			draw(n-1, x0, y1, size);                                                
			draw(n-1, x1, y1, size);                                           
			draw(n-1, x1, y0, size);            
			draw(n-1, x0, y0, size); 
		}                                   
		
	}
	
	
	public static void main(String[] args) {
		
		draw(4, .5, .5, .25);

	}

}

So, the above code doesn't actually produce what I need. The result is here

Any ideas or suggestions are greatly appreciated.

Thank you in advance.
Luke

Edited by: Luke on Apr 18, 2011 6:42 PM

Edited by: Luke on Apr 18, 2011 6:43 PM