ComputerCraft: Tofu

-- tofu
--  豆腐建築を行うプログラムです


-- ####### Config ###########
local haba = 9
local okuyuki = 7
local takasa = 3


-- ####### Functions ########
function placeSomeBlocks(n)
  if n<1 then
    turtle.placeDown()
    return
  end

  for i=1,n do
    turtle.forward()  -- move to next position
    turtle.placeDown()  -- put a block in the ground
  end
end

function placeSquare2(okuyuki, haba)
  for i=1,2 do
    placeSomeBlocks(okuyuki - 1)
    turtle.turnRight()
    placeSomeBlocks(haba - 1)
    turtle.turnRight()
  end
end

function placeSquare(nagasa)
  if nagasa < 2 then
    turtle.placeDown()
    return
  end

  for hen=1,4 do
    placeSomeBlocks(nagasa-1)
    turtle.turnRight()
  end
end

function goToRightForward()
  turtle.turnRight()
  turtle.forward()
  turtle.turnLeft()
  turtle.forward()
end

function selectNextSlot()
  local n = turtle.getSelectedSlot()
  if n == 16 then
    n = 1
  end
  turtle.select(n+1)
end

-- ###### Main ########
turtle.select(1) -- the usual phrase

turtle.up()  -- move up

-- stack six squares
for ronoji=1,takasa do
  -- 1st stage is made with slot 1, 2nd stage is slot 2, ...
  turtle.select(ronoji)

  -- 四角形の形にブロック配置
  -- placeSquare(haba)
  placeSquare2(okuyuki, haba)
  turtle.up()  -- move up
end



-- 屋根作り

while (okuyuki > 0) or (haba > 0) do
  print(okuyuki, haba)
  placeSquare2(okuyuki, haba)
  selectNextSlot()
  goToRightForward()
  okuyuki = okuyuki - 2
  haba = haba - 2
end

redstone.setOutput("bottom",true)