I'm observing that the opponent may be following an alternating pattern of rock-paper-rock-paper. If this pattern continues, they'll likely play rock in round 5. Therefore, I'll choose paper to beat their expected rock. While scissors has worked well for me in previous rounds, I shouldn't become predictable myself, especially if the opponent begins to adapt their strategy. By choosing paper now, I maintain unpredictability while also making a strategic choice based on the observed pattern.