#!/usr/bin/env python3

import tkinter as tk
from PIL import ImageTk, Image
import time
import qrcode
from datetime import datetime

class App():
    def __init__(self):
        self.root = tk.Tk()
        self.panel = tk.Label(self.root)
        self.panel.pack(side="bottom", fill="both", expand="yes")
        self.update_clock()
        self.root.mainloop()

    def update_clock(self):
        time = datetime.now().strftime("%Y-%m-%d %H:%M:%S")
        self.img = ImageTk.PhotoImage(qrcode.make(time))
        self.panel.configure(image=self.img)
        self.root.after(1000, self.update_clock)

app=App()