1 import time
   2 import Tkinter as tk
   3 
   4 SIZE = 200
   5 LEFT = -2
   6 RIGHT = 0.5
   7 TOP = 1.25
   8 BOTTOM = -1.25
   9 ITERATIONS = 20
  10 
  11 root = tk.Tk()
  12 can = tk.Canvas(width=250,height=200)
  13 can.pack()
  14 
  15 UPDATE_TIME = 0.2
  16 start_time = time.time()
  17 next_update = start_time + UPDATE_TIME
  18 for y in range(SIZE):
  19     for x in range(SIZE):
  20         z = complex(0,0)
  21         c = complex(LEFT + x * (RIGHT-LEFT)/SIZE, TOP + y * (BOTTOM-TOP)/SIZE)
  22         for count in range(ITERATIONS):
  23             if abs(z) <= 2.0:
  24                 z = z * z + c
  25             else:
  26                 break
  27         if count <= 5:
  28             can.create_text(x,y,fill='grey',text='.')
  29         elif count<=10:
  30             can.create_text(x,y,fill='green',text='.')
  31         elif count<=15:
  32             can.create_text(x,y,fill='blue',text='.')
  33         else:
  34             can.create_text(x,y,fill='black',text='.')
  35         if time.time() > next_update:
  36             next_update = time.time() + UPDATE_TIME
  37             root.update()
  38 
  39 root.mainloop()