miner

function mineSection()
    turtle.dig()
    turtle.forward()
    turtle.digUp()
end

function doesTurtleHaveSpace()
    return turtle.getItemCount(16) == 0
end

function fuelUpBaby()
    for i = 1, 16, 1 do
        turtle.refuel(i)
    end
end

function goHome(index)
    fuelUpBaby()
    for i = 0, index, 1 do
        turtle.back()
    end
end

function tunnel()
    index = 0
    while doesTurtleHaveSpace() do
        mineSection()
        index = index + 1
    end
    return index
end

function clearStones()
    for i = 1, 16, 1 do
        data = turtle.getItemDetail(i)
        if data ~= nil then
            if data.name == "minecraft:cobblestone" or data.name == "minecraft:stone" then
                turtle.select(i)
                turtle.drop()
            end
        end
    end
    turtle.select(1)
end

function main()
    index = 0

    while doesTurtleHaveSpace() do
        index = index + tunnel()
        clearStones()
    end

    goHome(index)
end

turtle.refuel()
main()