Melflex

I was just looking for something simple to start with. Thanks for your help I was able to get it working by following your advise.

Hi I have been trying to write my first mod I am using forge 1.15.2 - 31.1.49, I started off with something basic, a new block type and then added drops and custom items (tools and armor) made from the new block and this all works. I would like to finish the mod off by making the new block type appear naturally in the world, I have found a few references to IWorldGenerator although most of these were for 1.12 and these don't seem to carry over nicely. Is this still the right way to go about it or is there a better way? If there is some documentation or examples of how this works for 1.15.2 that someone can point me to it would be most appreciated thank-you. I looked at Hardores mod but I was unsure if this would be the same for a custom block.