[1.7.2]Items dropping as grass seeds

[pta2002]

Hey guys,  I'm making my mod and I just added a new seed. I want it to be dropped from grass with the same rarity as normal seeds. How do I do that? I only found one tutorial, but I don't understand, because he is just typing and I don't understand what the things do (Bad tutorial )So, if anyone can link me some tutorial or explain me what do do, it will be appreciated

[pta2002]

I found a way! I used MCreator and checked the code it uses