local j = 0

function reful()
	if turtle.getFuelLevel() < 2 then

        j = j+1
        if j > 14 then
            j = 1
        end

        turtle.select(j)
        turtle.refuel(1)

    end
end

for i=0, 2 do

	reful()
    turtle.dig()
    while turtle.detect() do
		reful()
        turtle.dig()
    end
	reful()
    turtle.forward()

	reful()
    turtle.digUp()
    while turtle.detectUp() do
		reful()
        turtle.digUp()
    end
	reful()
    turtle.digDown()

	reful()
    turtle.turnRight()
	reful()
    turtle.dig()
    while turtle.detect() do
		reful()
        turtle.dig()
    end
	reful()
    turtle.forward()

	reful()
    turtle.digUp()
    while turtle.detectUp() do
		reful()
        turtle.digUp()
    end
	reful()
    turtle.digDown()

	reful()
    turtle.dig()
    while turtle.detect() do
		reful()
        turtle.dig()
    end
	reful()
    turtle.forward()

	reful()
    turtle.digUp()
    while turtle.detectUp() do
		reful()
        turtle.digUp()
    end
	reful()
    turtle.digDown()

	reful()
    turtle.dig()
    while turtle.detect() do
		reful()
        turtle.dig()
    end
	reful()
    turtle.forward()

	reful()
    turtle.digUp()
    while turtle.detectUp() do
		reful()
        turtle.digUp()
    end
	reful()
    turtle.digDown()

	reful()
    turtle.turnLeft()
	reful()
    turtle.turnLeft()
	reful()
    turtle.forward()
	reful()
    turtle.forward()
	reful()
    turtle.forward()
	reful()
    turtle.turnRight()

end