Digital Workshop

Hello,
I am trying to a build simple binary logic table.
Any help would be so appreciated.

I would like to create a set of 5 cards in a row. Each card would have a white color on one side and a black color on the other side. Clicking each card would make it spin and show the other color. ( I know how to do this).

When the the number of black cards add up to an even number, the fifth card would show a black color.

When the number of black cards add up to an odd number , the fifth card would show a white color.
I know I have to use a script, but any help in getting me started would be very appreciated.