基本的に、var2 でボトルをその数だけ落とすようにしたいです。たとえば、10 を入力してから 2 を入力すると、ボトルは 10 8 6 4 2 0 のように 2 秒でカウントダウンされます。
var = raw_input(" Enter bottle number ")
var2 = raw_input(" Enter how many bottle taken down ")
bottle_number = int(var)
bottle_down = int(var2)
countdown = ""
while bottle_number > 0:
print bottle_number, "bottles of beer on the wall,", bottle_number, "bottles of beer."
print "Take one down and pass it around,", bottle_number - 1, "bottles of beer on the wall."
print " "
countdown = bottle_number - 1
bottle_number = countdown
if bottle_number == 0:
print """
No more bottles of beer on the wall, no more bottles of beer.
"""