ACKtbt

I haven't been able to find anything on it to help me, can you please propose some code to get me started because i honestly haven't done much with this stuff, i'm used to simple creating new items, etc.

Thanks that's what I needed

Hello. I am coding a mod that is trying to improve everything about Minecraft, and I want to know how to stop a vanilla structure from generating. Specifically I want to remove the amethyst geode. Also in the future I will need to replace structures like the stronghold so please help with that as well. Thank you for any help. (Btw I am a beginner so I may need a little more help)