# Tk_rgb_sequences.py

# Tk_rgb_sequences.py

from tkinter import *
from PIL import Image, ImageTk
import math
from itertools import combinations

ww = 500
hh = 500

sz = 10

root = Tk()
root.geometry("%dx%d+0+0"%(ww,hh))
canvas = Canvas(root, width=ww, height=hh)
canvas.pack()


t = range(0,256,5)
TTT = []
for r in t:
    for g in t:
        for b in t:
            TTT += [(r, g, b)]
# TTT.sort(key=sum)
TTT = TTT[1:-1]+TTT[::-1]
LLL = len(TTT)

xy = []
for y in range(0,hh,sz):
    for x in range(0,ww+1,sz):
        xy += [(x,y)]

def make_rgb():
    return '#%02X%02X%02X'%(r,g,b)

i = 0
seq = 1 # sequences
sub = 1
while 1:
    ttt = TTT[:]
    L = LLL
    seq += 1
    sub = seq
    print (seq)
    canvas.delete('all')
    for x,y in xy:
        r,g,b = ttt.pop(sub%L)
        L = L - 1
        sub = sub + seq
        canvas.create_rectangle((x, y, x-sz, y+sz), fill=make_rgb(), width=0)
    canvas.update()