Can't make the timer decrease more then once

Question

I am trying to create a timer, which right now looks like this:

    #Timer 60 sec.
import time
sec = 60
def updateTimer():
    trecker.config(text = sec-1)
    trecker.after(1000, updateTimer)

trecker = Label(gui, text = sec)
trecker.place(x=500, y=200)
trecker.after(1000, updateTimer)

And the reason I write here is that it displays 60, changes to 59 and then stops. I tried to loop it with for in range, but it doesn't help. My idea right now, is that it calls for updateTimer function in the inside of its execution restarting itself. But it, for some reason does nothing.

Answer 1

sec-1 is just always 59 because 60-1=59. Instead write:

def updateTimer():
    sec -= 1
    trecker.config(text = sec)
    trecker.after(1000, updateTimer)