Countdown to rocket launch

Script

#!/usr/local/bin/python3.1
import time

count = 20
while count > 0:
        print (count),
        time.sleep(1),
        count -=1
time.sleep(1)
print ("Blastoff !!!!!!!!!!!!!!!!!!")
time.sleep(3)
print ()
print ()
print ()

Execution

20

19

18

17

16

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

Blastoff !!!!!!!!!!!!!!!!!!