Why does it say invalid syntax when I enter a colon?

Question

Python

Why does my program write invalid syntax with a colon?
The code:

import time
print ("Вітаємо вас у програмі VS TIMER! Введіть скільки ви хочете чекати: ")
min = int (input ("Хвилин: "))
sec = int (input ("Секунд: "))
int (timel = ((min)*(60))+(sec)) 
def Timestop:
    time.sleep(1)
    int (time = +1)
    print (time)
for count in range(timel):
    Timestop

Answer 1

def Timestop():
  ...