Breakable objects


So I am new to the mechanics and no scripting experience. Also I used the DnD feature. Now with that out of the way... How can I auto generate a breakable ground? More specifically, at the start of a round, to make the grass, dirt, and rock tiles but as objects that can be destroyed. I want to have the game create the ground so that it would consume less code and perhaps many other things(I don't know much about what I am talking about but I think you get it).