Cell is equal to another cell until you write something in it

[hrzagi]

I dont get it how i choose cells, tried to change aryPair but nothing happens
This is example of program that I need and I supposed to upload it at the beginning. I didnt upolad original program because it has 16 modules and too much fields so it would be confusing to work with it but if this version would work I can easily apply code to original program.