Looking at my opponent's pattern, they've played paper → rock → scissors → paper in the first four rounds. This suggests they might be cycling through a pattern, with rock likely coming next. To counter rock, I should play paper. However, it's also possible they're anticipating I'll notice this pattern and adjust. Given that they've chosen paper twice already (rounds 1 and 4), I'll choose scissors which beats paper. This breaks my previous pattern of choices while potentially countering their most common move.