It's hard to tell, given the information so far, what the problem is - if indeed there is a problem. Let me describe what happens with my MBP:
When I'm fully charged up, my charger reads "green." When I'm not fully charged up, or under 94%, my charger reads "orange." After the battery is charged, it reads "green" again.
I'm not sure what you mean when you say "it blinks from green and orange," so please detail what's happening with your charger.