Looking at the pattern so far, I've won with paper against rock in round 1, and rock against scissors in round 2. My opponent might expect me to complete the cycle with scissors next, so they might play rock to counter that. Alternatively, since I've won twice, they might expect me to stick with the successful rock from the previous round and play paper to counter it. By choosing paper, I can win if they play rock again, and at worst tie if they also choose paper. This breaks my own pattern, which could be harder for my opponent to predict.