function select()
    while not turtle.select(slot) do
    slot = slot + 1
    end
end

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

function move()
    if forward then
        turtle.forward()
        posX = posX + 1
    end

    if backward then
        turtle.backward()
        posX = posX - 1
    end

end

function newline()
    turtle.left()
    turtle.forward()
    turtle.right()

    if forward () then
        forward = false
        backward = true
    end

    if backward () then
        forward = ture
        backeward = false
    end

end

slot = 2
forward = true
blockcount = 0

print("Starting to work")
turtle.select(1)

if turtle.refuel() then

    turtle.forward()
    turtle.turnRight()

    for posZ = 0, 22, 1 do

        for posY = 0, 22, 1 do
            blockcount = blockcount + 1
            if blockcount ~= 5 then
                placeDown()
        end

            if blockcount == 5  then
                blockcount = 0
            end

        move()
        end

        newline()

    end

else
    print("No Fuel found")
end
print("Done!")