# tk_rgb_interpolation.py

# tk_rgb_interpolation.py

import tkinter as tk
import random

ww = 400
hh = 400
canvas = tk.Canvas(width=ww, height=hh)
canvas.pack()

sq = 10
sq2 = sq // 2
rad = 1 / 11
ddd = [0]

def rgb():
    return [random.randint(128, 255) for i in range(3)]

def interpolate():
    canvas.update()
    def dist(x = sq / 2, y = sq / 2):
        return round(((i - x) ** 2 + (j - y) ** 2) ** 0.5 * rad, 2)
    # Initialize the grid with the corner values
    def quad():
        r = cubic(0)
        g = cubic(1)
        b = cubic(2)

        color = f"#{r:02x}{g:02x}{b:02x}"
        x2,y2 = x+3,y+3
        canvas.create_rectangle(x2+i, y2+j, x2+i, y2+j, fill=color, outline="")
    def cubic(k):
        return int(t[k] * d + cc[k] * (1 - d))

    for y in range(0, hh, sq):
        for x in range(0, ww, sq):
            x2, y2 = x + sq, y + sq
            c1 = grid[x, y]
            c2 = grid[x + sq, y]
            c3 = grid[x, y + sq]
            c4 = grid[x + sq, y + sq]
            cc = [int((c1[k] + c2[k] + c3[k] + c4[k]) / 4) for k in (0,1,2)]
            for j in range(0, sq2):
                for i in range(0, sq2):
                    t = c1
                    d = dist()
                    quad()
            for j in range(0, sq2):
                for i in range(sq2, sq):
                    t = c2
                    d = dist()
                    quad()
            for j in range(sq2, sq):
                for i in range(0, sq2):
                    t = c3
                    d = dist()
                    quad()
            for j in range(sq2, sq):
                for i in range(sq2, sq):
                    t = c4
                    d = dist()
                    quad()

    canvas.update()

while 1:
    grid = {}
    for x in range(0,(ww+sq+1),sq):
        for y in range(0,(hh+sq+1),sq):
            grid[x,y] = rgb()

    interpolate()