Regarding ADAROKS2 IN May Long Challenge 2019

Ideone link is for the pattern.
Can anyone please tell where a rectangle or square is made in this pattern ??
This is my pattern for 100 x 100 chess board.
This pattern gave WA in ADAROKS2
The Problem Link :

here are the four coordinates :
(23,37), (23,100), (35,37) and (35,100)

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@suhail25 Thanks so much for helping me !!