Wither turtle

cID = 6

if rednet.isOpen("right") == false then
  rednet.open("right")
end

if turtle.getFuelLevel() < 90 then
  turtle.select(4)
  turtle.refuel()
end

function place_base()
  turtle.forward()
  turtle.forward()
  turtle.forward()
  turtle.forward()
  turtle.select(1)
  turtle.up()
  turtle.forward()
  turtle.placeDown()
  turtle.turnLeft()
  turtle.place()
  turtle.turnRight()
  turtle.turnRight()
  turtle.place()
  turtle.turnLeft()
  turtle.up()
  turtle.placeDown()
  turtle.select(2)
  turtle.turnLeft()
  turtle.place()
  turtle.turnRight()
  turtle.turnRight()
  turtle.place()
  turtle.turnLeft()
  turtle.back()
end

function place_tete()
  if not turtle.detectDown() then
    print("MFFS not activated !")
    return false
  end

turtle.place()
turtle.back()
turtle.down()
turtle.back()
turtle.back()
turtle.back()
turtle.down()

end

while true do
 id, message = rednet.receive()

  if id == cID then

     if message == "place_base" then
       place_base()
       rednet.send(cID, "base_done")
     end

     if message == "place_tete" then
       place_tete()
     end

  end
end