Minecraft world type...

Hello guys! Im a newbie to unity forum.I made a world generation like minecraft but 10x10 grid.This is kinda hard to tell but spawning some trees and stones would be better though.Heres some screenshot’s but i want to ask that how would i make stone spawns at the same time?

I got everything grass and 3 trees.What i want to do is to spawn dirt and stone to generate a mountain like in minecraft.I keep figuring this out but still cant.

So anybody can help me?

If you look a few posts below yours… http://forum.unity3d.com/threads/63149-After-playing-minecraft

Also I am assuming you are generating 10x10 cube prefabs, that ain’t gonna work