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It draws a randomly selected Julia fractal set each time.

Python, 42 lines
 ``` 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42``` ```# Julia fractals # FB - 201003254 from PIL import Image import random # image size imgx = 512 imgy = 512 image = Image.new("RGB", (imgx, imgy)) # drawing area xa = -2.0 xb = 2.0 ya = -1.5 yb = 1.5 maxIt = 255 # max iterations allowed # find a good Julia set point using the Mandelbrot set while True: cx = random.random() * (xb - xa) + xa cy = random.random() * (yb - ya) + ya c = cx + cy * 1j z = c for i in range(maxIt): if abs(z) > 2.0: break z = z * z + c if i > 10 and i < 100: break # draw the Julia set for y in range(imgy): zy = y * (yb - ya) / (imgy - 1) + ya for x in range(imgx): zx = x * (xb - xa) / (imgx - 1) + xa z = zx + zy * 1j for i in range(maxIt): if abs(z) > 2.0: break z = z * z + c image.putpixel((x, y), (i % 8 * 32, i % 16 * 16, i % 32 * 8)) image.save("juliaFr.png", "PNG") ```
 Created by FB36 on Tue, 16 Mar 2010 (MIT)