local tArgs= { ... }
local mode = tArgs[2]

local patterns = {"322322,333332,322222,222222,", "233322,322232,233322,222222,"}

local traversed = 0

turtle.select(1)
turtle.refuel()


function moveBack()
  while traversed > 0 do
    traversed = traversed - 1
    if mode == "x" then
      turtle.forward()
    else
      turtle.down()
    end
  end
end

function placeMove(c, n)
  if n ~= "," then
    traversed = traversed + 1
    if mode == "x" then
      turtle.back()
    else
      turtle.up()
    end
  else
    if mode == "x" then
      turtle.turnRight()
      turtle.back()
    else
      turtle.back()
    end
  end

  turtle.select(tonumber(c))
  while turtle.getItemCount() == 0 and turtle.getSelectedSlot() < 12 do
    turtle.select(turtle.getSelectedSlot() + 2)
  end

  if n ~= "," then
    if mode == "x" then
      turtle.place()
    else
      turtle.placeDown()
    end
  else
    if mode == "x" then
      turtle.place()
      turtle.turnLeft()
    else
      turtle.place()
    end

  end

end

function executeCommand(c, n)
  if c == "," then
    moveBack()
  else
    placeMove(c, n)
  end
end

function drawLetter()
  local rand = math.floor(math.random()+.5)
  local pattern = patterns[rand + 1]
  for i = 1, #pattern do
    local c = pattern:sub(i,i)
    local n = pattern:sub(i+1, i+1)
    executeCommand(c, n)
  end
end

if mode == "x" then
  turtle.turnLeft()
end

local numLetters = tonumber(tArgs[1])
for i = 1, numLetters do
  drawLetter()
end

if mode == "x" then
  turtle.turnRight()
end