Cell A1 countsif a value appears in cells b1; b2 or b3. I want to copy cell
A1 into cell A2 etc but want the countsif reference to jump to b4; b5 or b6.
Currently if I copy it down to A2 the reference changes to b2; b3 and b5.

I need to copy hundreds of cells like this and I'm trying to avoid doing it
manually.