PYTHON

from tkinter import *
from tkinter.ttk import *
from time import strftime

root = Tk()
root.title('digital clock')

def  time():
    string = strftime('%H:%M:%S %p')
    label.config(text=string)
    label.after(1000,time)

label = Label(root,font=('consolas',80),background='black',foreground='cyan')
label.pack(anchor='center')

time()
mainloop()

        

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