# Blastoff!
import time
n = 5

while n >= 0:
	if (n == 0):
		print("Blastoff!")
	else:
		print(n)
	n -= 1
	time.sleep(1)

##############
import time

def countdown(n):
		
	print("Going in %d" % n)
	if (n <= 0):
		print("Blastoff!")
		return	
	time.sleep(1)
	countdown(n - 1)
	time.sleep(1)
	print("Going out %d" % n)

countdown(5)
print("Done")