"My Soul to Keep"

I'm really anxious to get into this story but there's going to be a lot of work to be before I can really get into it. I have to make sure I have the history worked out. By my character's reckoning one year is three hundred days long and they think the world was created six hundred thirty-five years ago. What they don't know (that is, they're not allowed to remember) is that every one hundred sixty years the entire population is killed and the habitat they live in is scrubbed clean. A new population is cloned and a new scenario is started. They alternate between cycles of war and peace. So yeah...there's a lot I have to plan out. I also have to figure out what my alien race looks like. I'm thinking of a cross between an octopus, a jelly fish and a starfish. Now I just have to do it.