Original plan

I originally decided to make a 10 second timer. This was not very hard to make and as I was making the code I realized it was very repetitive, but it worked.

import time
def countdown(sec):
    print(sec + " seconds remaining")
    time.sleep(1)

countdown("10")
countdown("9")
countdown("8")
countdown("7")
countdown("6")
countdown("5")
countdown("4")
countdown("3")
countdown("2")
countdown("1")
countdown("0")
print("Time's up!")

10 seconds remaining
9 seconds remaining
8 seconds remaining
7 seconds remaining
6 seconds remaining
5 seconds remaining
4 seconds remaining
3 seconds remaining
2 seconds remaining
1 seconds remaining
0 seconds remaining
Time's up!

Using a list

I realized as I was making the code that this is something which could be done by abstracting data. I did not want to type the whole list myself, so I found code on the internet which can create a list with any numbers you want. I chose 0-60 as that made the most sense, regarding the timer is only in seconds. You can make the list as big as you want though.

def create_list(r1, r2):
    if r1 == r2:
        return r1
    else:
        res = []
        while (r1 < r2+1 ):
            res.append(r1)
            r1 += 1
        return res

# create list of number 0-60 for one minute
r1, r2 = 0, 60
print(create_list(r1, r2))

[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60]

I then turned this list created into a defined list in my code:

seconds = ["0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12", "13", "14", "15", "16", "17", "18", "19", "20", "21", "22", "23", "24", "25", "26", "27", "28", "29", "30", "31", "32", "33", "34", "35", "36", "37", "38", "39", "40", "41", "42", "43", "44", "45", "46", "47", "48", "49", "50", "51", "52", "53", "54", "55", "56", "57", "58", "59", "60"]
print(seconds)

['0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '10', '11', '12', '13', '14', '15', '16', '17', '18', '19', '20', '21', '22', '23', '24', '25', '26', '27', '28', '29', '30', '31', '32', '33', '34', '35', '36', '37', '38', '39', '40', '41', '42', '43', '44', '45', '46', '47', '48', '49', '50', '51', '52', '53', '54', '55', '56', '57', '58', '59', '60']

Here is the code for the actual program I created. I realized along the way that it would be really cool if you could choose how long you wanted the timer be instead of just having it a minute long. Using what I learned about loops recently, I realized a while loop can create the function I wanted. However, I ran into multiple problems such as the list counting backwards and the loop never stopping, but after changing parts and a couple internet searches I figured out how to make it work the way I wanted to. You can input any number from 0-60 and it will give you a timer of that long.

def timer():
    time_wanted = int(input("How many seconds do you need?"))
    while time_wanted < len(seconds):
        record = seconds[time_wanted]
        countdown(record)
        time_wanted -= 1
        if time_wanted == -1:
            break
    return

timer()
print("Time's up!")
    

10 seconds remaining
9 seconds remaining
8 seconds remaining
7 seconds remaining
6 seconds remaining
5 seconds remaining
4 seconds remaining
3 seconds remaining
2 seconds remaining
1 seconds remaining
0 seconds remaining
Time's up!