Question
After Effects Flipping windowpanes

I have a window with panes and I want to flip the panes (transition to different colors) within after effects. I have looked into 'Card Wipe' and it does what I want on the entire composition, but I want it to work for these 3 columns and 4 rows only. I could mask to the window and scale the 'Card Wipe' tiles, but stuggling to find an easier method that trail and error. Any ideas from more experienced After Effects users?
