Just connect them with a 'else', although I think it's not
logical if there are more than 2 possibilities... What should
happen if root.section == "images/bc_something" (if that's possible
in your movie)?
Anyway, this is how it looks:
This code would change the pic to bc_sample.jpg, if it was
bc_self.jpg before. Is that what you want? If you leave out he
'else', it would change to bc_sample.jpg and right after that back
to bc_self.jpg in the same case.