# Tk_fibonacci_sphere.py

# Tk_fibonacci_sphere.py

from Tkinter import *
import math
import random
import time

root = Tk()

c_width = 600
c_height = 600
canvas = Canvas(root, width=c_width, height=c_height, bg='white')
canvas.pack()

def fibonacci_sphere(samples=1):
    points = []
    offset = 2./samples
    increment = math.pi * (3. - math.sqrt(5.));

    for i in range(samples):
        y = ((i * offset) - 1) + (offset / 2);
        r = math.sqrt(1 - pow(y,2))

        phi = ((i + 1.) % samples) * increment

        x = math.cos(phi) * r
        z = math.sin(phi) * r

        points.append([x,y,z])
    points.sort(key=lambda z:z[-1])
    return points

wait = 0
while 1:
    if not wait:
        points = random.randint(200,500)
        for x,y,z in fibonacci_sphere(points):
            x,y = [int(r*250+300) for r in [x,y]]
            z = int((z+1)*50)/20
            color = '#%02x%02x%02x' % (180, 210-z*12, 180)
            canvas.create_oval(x, y, x+z+4, y+z+4, fill=color, outline=color)
            wait = time.time()+2
    if wait < time.time():
        canvas.update()
        canvas.delete('all')
        wait = 0

root.mainloop()