The original code does not return the value in the if-clause and the return statement in the else-clause, which led to the function returning None at the end of the countdown (5, 4, 3, 2, 1, 0, None).
The original code does not return the value in the if-clause and the return statement in the else-clause, which led to the function returning None at the end of the countdown (5, 4, 3, 2, 1, 0, None).