fence

local tArgs = {...}
--Movement and Placement of Fence
function place(size)
  local num = size
  repeat
  turtle.place(1)
  turnAround()
  look()
  turnAround()
  turtle.back()
  sleep(1)
  num = num - 1
  until num == 0
end

function turnAround()
  turtle.turnLeft()
  turtle.turnLeft()
end

function look()
  if turtle.detect() then
    turtle.dig()
  end
end

function lastPlace()
  turtle.place(1)
  turtle.turnLeft()
  look()
  turnAround()
  turtle.back()
end

function lastFence()
  turtle.turnRight()
  sleep(1)
  look()
  sleep(1)
  turnAround()
  turtle.back()
  turtle.place(1)
end
--Main Program
local n = tonumber(tArgs[1])
for i=1,3,1 do
turtle.select(i)
place(n-1)
sleep(1)
lastPlace()
sleep(1)
end
turtle.select(4)
place(n-2)
lastFence()