multiple conditional format conditions changed based on another cells value?

A1:A6 have numeric values 1 to 6.

I want the conditional format values to change Based on the value in Cell B2.

If the value in B2 is "old", then I want these conditional format conditions for A1:A6. Numbers between 1-2=green text, 3-4=orange text and 5-6=red text.

IF the value in B2 is "new" then I want the conditional format conditions in A1:A6 to change so 1=black text, 2-3=green text, 4-5=orange text and 6=red text.

I know how to do multiple conditional formats but i have no clue how to change multiple conditions based on another cells value.

I hope this is simple and easy to understand. Thanks in advance.