while (bActive)
            {
                xDir += RND.Next(-ResX * Scale, ResY * Scale);
                yDir += RND.Next(-ResY * Scale, ResY * Scale);

                float distance = (float)Math.Sqrt(xDir * xDir + yDir * yDir);
                xDir = xDir / distance;
                yDir = yDir / distance;

                pX += xDir*Scale;
                pY += yDir*Scale;

                if (pX > ResX-1)
                    pX = ResX-1;

                if (pY > ResY-1)
                    pY = ResY-1;

                if (pY < 0)
                    pY = ResY-1;

                if (pX < 0)
                    pX = ResY-1;

                tBmp.SetPixel((int)(pX), (int)(pY), Color.Blue);
                Iterations++;

                if (Iterations >= MaxIterations)
                {
                    bActive = false;
                    pictureBox1.Image = tBmp;
                }
            }