Just making sure I understand your question: you want to use Anki, but don't want it to add new cards (blue) until you've finished your review of old cards (red and green)?
If that's what you're asking about, I've found the best way is to reduce today's new card limit to zero. I do this when I'm behind on Anki - this way you can finish your review of all the old cards you're learning before you add new cards. You'll have to manually change the new cards/day option back when you're done though.
Honestly, after reading your question again I'm not sure this is actually what you're asking. Can you clarify at all?