Possible optimization for color mixers?

I'm only on level 12, yet thinking around for quite a bit I made this interesting enough design to combine n number of belts together, though I feel like it's a bit too much and it can probably be shortened with a wayy easier solution. Thoughts? Here I combined 12 red and 12 green to get 12 yellow (eventually to use for white)

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https://preview.redd.it/awnw6v0hg1cb1.png?width=1920&format=png&auto=webp&s=c107d79027f5303bf3b679a59aa9d281759ed51f