hMine

-- pastbin.com/Edbsn4ga

local tArgs = { ... }
local length = 10
local torch_slot = 16
local fuel_slot = 15

if #tArgs ~= 1 then
    print('Usage: hMine <length>')
    return
else
    length = tonumber(tArgs[1])
end

function hMine()
    textutils.slowPrint(string.format('Mining forward %d blocks...', length))
    for i = 1, length, 1 do
        turtle.forward()
        detectDig()
        if i % 10 == 0 then
            placeTorch()
        end
    end
    placeTorch()
    print(string.format('Finished mining %d blocks!', length))
end

function detectDig()
    while(turtle.detect() == true) do
        turtle.dig()
    end
    while(turtle.detectUp() == true) do
        turtle.digUp()
    end
    turtle.digDown()
end

function placeTorch()
    local slotData = turtle.getItemDetail(torch_slot)
    if  slotData.name == "minecraft:torch" then
        turtle.select(torch_slot)
        turtle.turnLeft()
        turtle.turnLeft()
        turtle.place()
        turtle.turnLeft()
        turtle.turnLeft()
    else
        return
    end
end

hMine()

if (tArgs == "down" or tArgs == "Down") then

end