mine1

refuel()
digOnce()

function digOnce()
  turtle.dig()
  turtle.forward()
  turtle.digUp()
  turtle.up()
  turtle.digUp()
  turtle.up()

  turtle.turnLeft()
  turtle.dig()
  turtle.forward()
  turtle.digDown()
  turtle.down()
  turtle.digDown()
  turtle.down()

  turtle.dig()
  turtle.forward()
  turtle.digUp()
  turtle.up()
  turtle.digUp()
  turtle.up()

  turtle.turnRight()

  turtle.dig()
  turtle.forward()
  turtle.digDown()
  turtle.down()
  turtle.digDown()
  turtle.down()

  turtle.turnRight()
  turtle.dig()
  turtle.forward()
  turtle.digUp()
  turtle.up()
  turtle.digUp()
  turtle.up()

  turtle.dig()
  turtle.forward()
  turtle.digDown()
  turtle.down()
  turtle.digDown()
  turtle.down()

  turtle.turnLeft()
end

function refuel()
  if turtle.getFuelLevel() < 6 then
    for i = 1,16 do
      if turtle.getItemCount(i) > 0 then
        turtle.select(i)
        if turtle.refuel(1) then
          break
        end
      end
    end
  end
  turtle.select(1)
end