Pan Fried Cod with Citrus Basil Butter Sauce

Name: Pan Fried Cod with Citrus Basil Butter Sauce
Ingredients: 2 pieces white cod filets (8 oz each) (Rinsed and patted dry); 2 pieces oranges (One zested and juiced for marinade, one sliced with juice reserved for sauce); 1 piece lemon (Zested and juiced over the fish for marinade); 1/2 cup olive oil (Divided (1/4 cup for marinade, 1/4 cup for pan-frying)); 3 tbsp unsalted butter (Divided (2 tbsp for sauce, 1 tbsp stirred in at end)); 1 tsp light brown sugar; to taste salt; to taste black pepper; 1/4 to 1/3 cup fresh basil (Shredded, loosely packed)