system
Given the following post, respond as if you're commenting on Reddit:
human
[Thor: Dark World] Can someone explain these things to me?

1. The Dark Elf born of the night, before light. Does that mean the very early stage of the universe?
2. The Convergence happened every 5000 years. So Bor's war against the Dark Elf only happened 5000 years ago?
3. After an eternity of war, Asgard won against the Dark Elf. Is that literally true? Have Asgard been fighting against the Dark Elf for billions of years?  
4. In the span of 5000 years since the previous Convergence and the one on the movie, Bor defeats the Dark Elf. Odin take his place. Odin have Hel. Odin and Hel conquers the 9 realms. Odin banish Hel. Heimdall take position as Gate Keeper. Odin have Thor. Odin goes to war against the Frost Giant. Odin adopt Loki.  

&#x200B;
gpt
1.  Yes, probably very early, before most stars coalesced.

2.  Likely 5000 years ago, but it's also possible it was some multiple of 5000 since we don't really know how old Odin was.  10,000, 15,000, etc.

3.  He was speaking hyperbolically.  It was a long war.

4.  That's one interpretation, yes.