Impenia

Hey man, I am trying to get record for the last x number of rounds on Crash game. However, what I really want is for the script to be able to always update to the last x rounds. For instance, the last 500 rounds - when a new round shows, the furthest round becomes irrelevant such that the new round makes it 500, and it continues to update like that. I don't know if that is possible. Thanks