past tense - I had done when you had come by the evening

We have "A" and B moments in the past. "A" happened first, "B" happened second. "A" should be in Perfect. Example:

I had done when you came

I had done - "A"

When you came - "B"

"A" happened before "B"

If now we have "B" and "C" where "B" happened before "C", then "B" should be in Perfect, "C" - in Past Simple(if it's a verb). Example:

You had come by the evening

You had come - "B"

By the evening - "C"

Now we have "A", "B" and "C". "A" should be in Perfect because it happened before "B" but "B" simultaneusly should be in Perfect, either, because it in its part happened before "C". It's like if we have "A" and "D" where "A" is just "A" but "D" is ["B"+"C"]. Example:

I had done when you had come by the evening

I had done - "A"

When you had come - "B"

By the evening - "C"

When you had come by the evening - "D" ["B"+"C"]

Congratulations? Well done? Can I be proud of myself?:D