I have two storylines. One in the present and one about 70 years in the future. The characters in each story are different (although eventually they do reconnect). I am struggling with how two merge the two storylines. If they should have separate parts or flip back and forth. The present day character writes a journal predicting the life and events of the future character. ..so I think I need to start in the present....establish that time line and then add the second time line. Thoughts?