local dims = 6

function digNmove()
    if turtle.detect() then
        turtle.dig()
    end
    turtle.forward()
    print("digNmove")
    os.sleep(0)
end

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

function endRowTurn()
    print("entering endRowTurn with R_L value "..tostring(R_L))
    if R_L == "R" then
        turtle.turnRight()
        digNmove()
        turtle.turnRight()
        R_L = "L"
        print("endRowTurn R")
    else
        turtle.turnLeft()
        digNmove()

        turtle.turnLeft()
        R_L = "R"
        print("endRowTurn L")
    end
end



for i=1,dims do
    R_L="R"
    for j=1,dims do
        for k=1,dims-1 do

            checkFuelNrefuel()
            print(i,j,k)
            digNmove()
        end

        if not(dims == j) then
            endRowTurn()
        end
        
    end

    turtle.turnRight()

    for i=1,dims-1 do
        digNmove()
    end
    turtle.turnRight()
    turtle.digDown()
    turtle.down()
end