Seems I´ve done the homework here, but in a different way that the thing expected, because I´ve got printed what they ask.
What can I do so?
Thanks for your time,
the code-checker expects you to print 10 untill zero inclusive
but it encounters your "Blast off!"
And maybe capitalize your "off" word:
You are right Leon
I´ll try figure out how to do that.
I appreciate it!
I get your point.