Looking at my opponent's pattern, they've chosen paper twice (rounds 1 and 3) and haven't repeated the same move in consecutive rounds. After using scissors in round 4, they might return to paper, which they've shown a preference for. Even if they choose rock to counter my previous rock move, mixing up my strategy keeps me unpredictable. Choosing scissors gives me a good chance to potentially win if they return to paper while maintaining an unpredictable pattern in my gameplay.