This is a time machine. This works on Python 2.x and 3.x (tested on 2.5 and 3.2, respectively). What I am proud of: * no classes * very simple code of a time machine running on Tkinter. * does exactly as it says on the tin

time_machine.py

try:
    import Tkinter  as tkinter
    import tkFont
except ImportError:
    # python 3
    import tkinter
    import tkinter.font as tkFont

import time

root = tkinter.Tk()
root.overrideredirect(1)

def TimeMachineACTIVATOR():
    window.config(text=time.strftime("%I:%M:%S"))
    window.after(1000, TimeMachineACTIVATOR)

font = tkFont.Font(family="Helvetica", size=16)
window = tkinter.Button(root,
                        text = "THE TIME MACHINE",
                        font=font,
                        command=lambda: root.destroy())
window.pack(fill="both")

root.update()

width, height = root.winfo_width(), root.winfo_height()
x = (root.winfo_screenwidth() / 2) - (width / 2)
y = (root.winfo_screenheight() / 2) - (height / 2)
root.geometry("%ix%i+%i+%i" % (width, height, x, y))

TimeMachineACTIVATOR()

root.mainloop()