You can start with a system 'for loop' to run through each row so from 0 to array.width. Then within that loop you compare X,Y of the array using array conditions, where X is loopindex and Y is 1. Then again add a sub event using array conditions to compare current value if = 51, then you can stop loop and grab the value from array.at(loopindex,0) which is the other column. Note that I'm talking in terms of (x,y) your post seems to describe the array in terms of (y,x)