but really cropping is the one that matters the most so now the curl curl looks like a nice representation learning with RL so what did we do here we have our a replay buffer on which we normally would just run reinforcement learn and so we have our replay buffer we take on my observations now to replay buffer since this is a dynamical system we need to look at a sequence of frame and consider that a single observation otherwise we cannot observe philosophy and a single frame acknowledge their velocity so we'll have a stack of sequential frames