Stuck with using lists to solve task

[DPaul]

I find it less complicated that it seems.
Why it is called an exercise on lists, dunno...?
I think that starting like this

open = True
closed = not open
cells = [closed] * 100

saves you at least 10 lines of code.
(you save some if .. else statements)
I do use "enumerate", not knowing if that is allowed.
What is our friend the TS doing in the mean time?
Paul