Forget about what the other person said, of course it's okay if there is no complication, as long as your proving your point about the theme, whatever it happens to be. For example, for my HSC (theme=journey), I wrote about walking through the park on 2 different days (with lots of techniques like metaphors, symbolic imagery, etc). I made those two different days filled with 2 different moods and showed it through description. Eg, i used lots of positive imagery for the first day and the next i used negative imagery, but I was still describing similar settings. I used that to show how you can never have the same journey twice, and your outlook can change the journey your on, etc.
So if you have something creative in mind like that, it could possibly work.