Why do we perceive the passage of time? I think we are not actually perceiving the passage of time but things changing. So what does it take to perceive change

Why do we perceive the passage of time? I think we are not actually perceiving the passage of time but things changing. So what does it take to perceive change? Let's say there is an object changing color from red to blue and back every second or so. To perceive this change one must extract two bits of information from the current state of the universe, if they are different a color change occurred. The rest is in a certain sense a matter of belief. One has to believe that the first bit extracted from the current state of the universe reflects the current color of the object. So this bit could come from the wavelength of a photon hitting the eye or a camera sensor in a certain spot together with some belief of how the universe works with regard to the way light behaves and interacts with matter. For the second bit one has to believe that it reflects the color of the object some time ago. This bit would probably come from your memory or in case of the camera from some memory in the connected computer. This essentially requires all the same believes as for the first bit in order to determine the color of the object. But in addition it requires the believe that things change over time and that the memory stored and preserved information about the color of the object from some time ago. So somewhat interestingly the perception of change and in turn the passage of time doesn't fundamentally require something to change at all, it just requires a current state of the universe and a lot of assumptions or believes about the working of the universe and how this lead to the current state. This is good enough for philosophical zombies, conscious experience and qualia and so on might require some additional ingredients. Unfortunately I am not sure what this tells us about the universe. I guess the laws must at least allow the existence of some kind of memory, but that seems a low bar, anything with a delay can make a form of delay memory. The working of the universe must be stable to a certain extend across certain timescales, otherwise one couldn't rely on the memory. One could still perceive change but the change might not be real if the memory is not reliable. More interesting is probably what kind of options this allows for the evolution of the state of the universe, but I have no real idea what to say about that. But I guess as the perception of time is only dependent on the current state of the universe, the evolution could be quite different from the linear passage of time we perceive.