number of rows = 4
number of cols = 5
arr1:
[255, 184, 178, 84, 129]
[84, 255, 255, 130, 84]
[78, 255, 0, 0, 78]
[84, 130, 255, 130, 84]
arr1: number of white pixels = 5

arr2:
[221, 184, 178, 84, 135]
[84, 255, 255, 130, 84]
[78, 255, 0, 0, 78]
[84, 130, 255, 130, 84]

arr2 after processing:
[221, 184, 178, 84, 135]
[0, 125, 255, 130, 84]
[78, 255, 0, 0, 78]
[84, 130, 255, 130, 84]