clockapp

import tkinter as tk
from datetime import datetime

def update_time():
    current_time = datetime.now().strftime("%H:%M:%S")
    time_label.config(text=current_time)
    time_label.after(1000, update_time)

root = tk.Tk()
root.wm_attributes("-topmost", True)
root.title = "Clock app"
time_label = tk.Label(root, font=("Helvetica", 50))
time_label.pack()
time_label.configure(bg="black", fg="white")
update_time()
root.mainloop()