function refuel()
   if turtle.getFuelLevel() < 10 then
      turtle.select(1)
      turtle.refuel(1)
      print("refueling")
   end
end

function plant()
   turtle.select(2)
   turtle.placeDown()
end

function harvest()
   turtle.digDown()
end

function prepare()
   turtle.attackDown()
end

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

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

function work()
   refuel()
   harvest()
   prepare()
   plant()
   turtle.forward()
end

function main()
   print("Starting")
   refuel()
   turtle.up()
   turtle.forward()
   turtle.turnRight()

   for i=1,8 do
      work()
   end
   turnLeft()
   turtle.forward()
   for i=1,8 do
      work()
   end
   turnRight()
   turtle.forward()

   print("end")
end


main()