Memory puzzle на Python, Tkinker

import tkinter as tk
import random
 
 
CELLS_PER_SIDE = 4
counter = 0
 
#controller
class ControllerGame:
    def __init__(self, root):
        self.root = root
        self.data_game = DataGame()
        self.gui_game = GuiGame(root, *self.data_game.get_btn_list())
        self.get_started()
        self.counter = 0
        self.button1 = None
        self.button2 = None
 
    def get_started(self):
        btn_lst = self.gui_game.draw_buttons()
        for btn in btn_lst:
            btn.bind('<Button-1>', self.get_mouse_click)
 
 
    def get_mouse_click(self, event):
        w = event.widget
        pos = w.grid_info()
        button_ind = pos['column'] + pos['row'] * 4
        button_num = int(self.gui_game.draw_buttons()[button_ind]['text'])
        button = self.gui_game.draw_buttons()[button_ind]
        # self.show_button(button)
 
        if self.counter % 2 == 0:
            self.button1 = button_num
            self.counter += 1
            self.show_button(button)
            # self.root.after(500, self.hide_button(button))
 
        elif self.counter % 2 == 1:
            self.button2 = button_num
            self.counter += 1
            self.show_button(button)
        if self.button1 == self.button2:
            print('ok')
 
        print('button1', self.button1, 'button2', self.button2)
 
    def show_button(self, button_ind):
        button_ind['fg'] = 'red'
    # def hide_button(self, button_ind):
    #     button_ind['fg'] = 'white'
 
 
#view
class GuiGame:
    def __init__(self, root, *btn):
        self.root = root
        self.root.title('Memory puzzle')
        self.button_num = list(btn)
        random.shuffle(self.button_num)
 
    def draw_buttons(self):
        tmp_list = []
        for i, b in enumerate(self.button_num):
            b.grid(row=(i // CELLS_PER_SIDE), column=(i % CELLS_PER_SIDE), sticky='ew')
            tmp_list.append(b)
        return tmp_list
 
 
 
#model
class DataGame:
    def __init__(self):
        self.buttons_text = [1, 2, 3, 4, 5, 6, 7, 8] * 2
 
    def get_btn_list(self):
        btn_list = []
        for btn_i in self.buttons_text:
            b = tk.Button(root, text=str(btn_i), fg='black', bg='white', width=5, activeforeground='white',
                          activebackground='white', height=2, font=('Comic Sans MS', 12))
            btn_list.append(b)
        return btn_list
 
 
if __name__ == '__main__':
    root = tk.Tk()
    cg = ControllerGame(root)
    root.mainloop()