function row()
  for i = 1,16 do
    turtle.select(3)
    turtle.digDown()
    turtle.placeDown()
    turtle.forward()

    local fuellevel = turtle.getFuelLevel()
      if fuellevel < 1 then
        os.shutdown()
      end
   end
end

function leftReset()
  turtle.turnLeft()
  turtle.forward()
  turtle.turnLeft()
  turtle.forward()

  local fuellevel = turtle.getFuelLevel()
    if fuellevel < 1 then
      os.shutdown()
    end

end

function rightReset()
  turtle.turnRight()
  turtle.forward()
  turtle.turnRight()
  turtle.forward()

  local fuellevel = turtle.getFuelLevel()
    if fuellevel < 1 then
      os.shutdown()
    end
end

function resetAE()
  turtle.turnLeft()
  turtle.forward()
  turtle.forward()
  turtle.forward()
  turtle.turnLeft()
  turtle.forward()
end

function refuel()
  turtle.select(1)

  local coal = turtle.getItemCount(1) - 1
  turtle.refuel(coal)

  local fuellevel = turtle.getFuelLevel()

  if fuellevel < 3 then
    rednet.broadcast("Fuel level is low on the farming turtle.","fuelturtle")
  end
end

rednet.open("right")
row()
leftReset()
refuel()
row()
rightReset()
refuel()
row()
leftReset()
refuel()
row()
refuel()
resetAE()