Print out timer in discord bot python

I need a little help with making my python Discord bot run another python script that contains a timer in it. I am not very used to if name == "main": but I thinks that the solution. So, whenever my bot is up, and I say for example $account, it has to run another python file in the same folder and start a countdown in the chat. MAIN DISCORD BOT FILE:

import nextcord
from nextcord import Interaction
from nextcord.ext import commands

intents = nextcord.Intents.all()
intents.members = True

client = commands.Bot(command_prefix = '!', intents=intents)

@client.event
async def on_ready():
    print("The bot is now ready for use")

testingServerID = 1006122650088775731

@client.event
async def on_message(message):
  if message.author == client.user:
    return

  if message.content.startswith('$account'):
    #(RUN TIMER HERE)
    await message.channel.send("COUNTDOWN")
  else:
    await message.channel.send("Please use **/account** to get a new account")

client.run('TOKEN')

AND THE timer file is here:

import time
  
# define the countdown func.
def countdown(t):
    
    while t:
        mins, secs = divmod(t, 60)
        timer = '{:02d}:{:02d}'.format(mins, secs)
        print(timer, end="\r")
        time.sleep(1)
        t -= 1
      
    print('Fire in the hole!!')
  
  
# input time in seconds
t = 20
  
# function call
countdown(int(t))