Randomized Turtles - code

local stream = dofile("stream.lua")
stream.aiStream = function(max_n)
  ret = stream.Stream()

  tStorage = {}

  function next()
    return table.remove(tStorage, 1)
  end

  function generate(target_amt)
    local i = #tStorage
    repeat
    i = i+1
    tStorage[i] = roll()
    until i == target_amt
  end

  function hasNext()
    return #tStorage > 0
  end

  ret.next = next
  ret.generate = generate
  ret.hasNext = hasNext
  return ret
end
function roll()
  local n = math.random(1,8)
  return n
end
function boundaries()
  local t,n = turtle.inspect()
  if t then
    if n['name'] == "minecraft:planks" or n['name'] == "minecraft:glass" then
      return true
    else
      return false
    end
  else
    return false
  end
end
local function fuel()
	if turtle.getFuelLevel() < 10 then
		turtle.select(16)
		turtle.refuel()
		turtle.select(1)
	end
end
local ai = stream.aiStream()
ai.generate(20)
while ai.hasNext() do
  local touching = boundaries()
  local act = ai.next()
  fuel()
  if act == 1 then
    turtle.up()
  elseif act == 2 then
    turtle.down()
  elseif act == 3 then
    turtle.turnLeft()
  elseif act == 4 then
    turtle.turnRight()
  elseif act == 5 then
    turtle.forward()
  elseif act == 6 then
    turtle.back()
  elseif act == 7 and touching == false then
    turtle.dig()
  else
    turtle.place()
  end
end