How do I check Array next value?

Hi,

So I have an array and want to check if the next value is the same as the current one, for example:

0,1,1,0,0,0

I need to know that in coordenates x1 and x2, there are two adjacent numbers in equal value.

This is what I have, but it is missfiring, it is not detecting what I want, what am I doing wrong?

Thanks!!!

The algorithm works fine, I was mistaken the x axis for the y axis, classic mistake.