function selectItem(name)
    for i=1,16 do
        turtle.select(i)
        local data = turtle.getItemDetail()
        if data and data.name == name then
            return
        end
    end
end

function forward()
    while turtle.attack() do
    end
    while turtle.dig() do
    end
    turtle.forward()
end

for i=1,64 do
        forward()
    selectItem("minecraft:glowstone")
        turtle.digDown()
        turtle.placeDown()
end