How to do the BacktrackPara maze generation algorithm

Hi,
I’m currently trying to program a maze generation algorithm. The current backtracking algorithm works fine for me but feels like the player could easily walk from 1 end to the maze to the other. My question is how could I program multiple Backtrack algorithms to work at once and for my situation, I have to use the Backtrack maze generation algorithm.
If you want to know what a BacktrackPara algorithm looks like go to this place and click on “BacktrackPara”.

My current attempts haven’t been so favorable with cells being left out or cases where there seem to be giant holes.

I’ve solved it. If a mod sees this, you can delete this post or close this post.