Generating Trees/Rocks, etc. on a grid?

This is interesting idea as I haven't really seen much of this done on roblox my thinking would be is to make a bunch of 5x5 parts and then store their positions within a table

using

table.insert

and then pick a random position from that table to place a tree at btw if you are moving a model doing

local model = game.Lighting.MODELNAME -- this would be a tree or rock
local table = {} -- create a empty table

local children = workspace:GetChildren()
for i = 1, #children do
	if children[i].Name == node then
    print(i, children[i].Position)
	table.insert(children[i].Position)
	else
end

local chosenposition = table[math.random(1, #table)] -- pick random position from the table
local c = model:Clone() -- copy the model
c.Parent = game.Workspace -- move the copied model to the workspace
c:Move(vector3.new(chosenposition)) -- move the model to the position of the part
table.remove(table, chosenposition)

I think that's roughly how it would work hope it helps :)