Can someone please make a longer green light mod? I feel like the green light as of right now are way too short

Can someone make a heavier rain intensity mod?

I just uploaded a mod and I was wondering how I would update the mod without uploading the mod twice?

I'm developing a tree mod, and my map editor has 2-3 types of trees and 2-3 types of Joshua trees by default. I was wondering how I can add different types of trees like palm trees, etc.