Построение лямбда-фрактала на C#

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
 
namespace Lambda_fractal
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
 
        struct Complex
        {
 
            public double x;
            public double y;
 
        };
 
        public void draw_fractal(int Width, int Height, Pen drw_pen, Graphics g)
         {
              int iterations = 50, max = 3;
              int xc, yc;            
              int x, y, n;
              double p, q;             
              Complex z, c;         
                 xc = (Width-10)/2;                  
                 yc = (Height-10)/2;
 
              for(y=-yc; y < yc; y++)
               {
                   for (x = -xc; x < xc; x++)
                     {
                        n = 0;
	             c.x = x * 0.01 + 1;
	             c.y = y * 0.01;
 
		        z.x = 0.5;
	                z.y = 0;
 
		  while ( (z.x*z.x + z.y*z.y < max) && (n < iterations) )
                         {
                            p = z.x - z.x*z.x + z.y*z.y;
	                    q = z.y - 2 * z.x * z.y;
			   z.x = c.x * p - c.y * q;
			   z.y = c.x * q + c.y * p;
                  		  n++;
                          }
                      if (n < iterations)
                       {
                           drw_pen.Color = Color.FromArgb(255, 0, (n * 15) % 255, (n * 20) % 255);
                           g.DrawRectangle(drw_pen, xc + x, yc + y, 1, 1);
                        }
 
                      }
                 }
          }
 
        private void Draw_click(object sender, EventArgs e)
        {        
            int Width=1027, Height=510;
 
            Pen drw_pen = new Pen(Color.Black, 1);
            Graphics g = Graphics.FromHwnd(pictureBox1.Handle);
            draw_fractal(Width, Height, drw_pen, g);
        }
 
        private void Picture_box(object sender, EventArgs e)
        {
 
        }
    }
}