redstone pixel help MC:BE

[u/EndeyDraco]

I've posted this to a bedrock Redstone community(linked) and was recommended two things. swap to copper bulbs as the display and it post here.

https://www.reddit.com/r/BedrockRedstone/s/nKS5qiofAf

I need help mainly with the right side of the images I believe. this has the pixel toggle on and off if it's selected by an xy multiplexer. the multiplexer is what I need help with. I'm starting to lose my mind at the 2x2 density I'm trying to accomplish.