Time Will Tell - a Gravity Falls fanfic

After the mystery twins discovered that their great uncle, Stan, had a brother, things started to change, sometimes for the better. Even the great Pacifica Northwest became their friend after Dipper had defeated the lumberjack ghost. But summer doesn't last forever, and soon, they had to go back to their hometown. But after things go wrong during their farewell party, only time will tell if they can still go back to their old lives.