Hello everyone. I'm working on a video-game that takes place on a distant earth like planet. A key part of the gameplay revolves around a special day and night cycle. I'd like this planet to be tidally locked to it's red dwarf star making it's habitable zone limited to the terminator. Of course this would mean that the sun would be always fixed in the sky and no cycle could take place. I'm here to ask you guys if there's any way to make it possible for the sun to rise up from the horizon slow down and then set again. I've been searching and I've heard about this effect called libration. Would this make it possible? And how would that work? Maybe you know of other possibilities. Would a large moon cause the planet to wobble slightly? If it turns out that this is possible, what would be the shortest time for a day\night cycle to occur? I'd really like for this to happen in the span of a few hours so that the effect is noticeable for the player. Any help is appreciated.