Python-Code

#Python 2.X: tkinter = Tkinter
import sys, tkinter, time

def ende():
	sys.exit(0)

def countdown():
	eingabe = e.get()
	try:
		zeit = int(eingabe)
		
		for i in range(zeit,0,-1):
			label["text"] = "Countdown: " + str(zeit-1)
			zeit -= 1
			time.sleep(1)
			main.update()
		label["text"] = "Fertig!"		
		print('\a')
	
	except:
		label["text"] = "Bitte nur ganze Zahlen"

#Fenster erstellen
main = tkinter.Tk()
main.title("Countdown")

#Ueberschrift
label_text = tkinter.Label(main, text = "Countdown in Sekunden:")
label_text.pack()

#Eingabefeld
e = tkinter.Entry(main)
e.pack()

#Anzeigefeld
label = tkinter.Label(main)
label.pack()

#Start Button
button_start = tkinter.Button(main, text = "Start", command = countdown)
button_start.pack()

#Beenden Button
button_ende = tkinter.Button(main, text = "Beenden", command = ende)
button_ende.pack()

main.mainloop()