This program draws patterns to remember if you have bought a binary watch (for example from 01theone.com)

binary-clock-patterns.py

#!/usr/bin/env python
from Tkinter import *
master = Tk()

w = Canvas(master, width=150, height=930)

#for n in range(1,61):
n = 1
for x in ( 3,6,12,24,48,7,14,28,56,15,30,60,5,10,20,40,21,42 ):
    i = 0
    for z, c in enumerate( "%06d" % int( bin(x)[2:] ) ):
        if int(c):
            f = "black"
        else:
            f = ""
        w.create_rectangle( 15+15*i, 0+15*(n), 15+15*(i+1), 0+15*(n+1), fill=f )
        i += 1
    w.create_text( 15+15*(i+1)+5, 0+15*(n+1), text = x, anchor = "sw" ) 
    n += 1
    
w.pack()
mainloop()