Turtle Tunnel Miner

-- Script made by Oysi

local args = {...}

local height = args[1]
local depth = args[2]

local function mineForward()
    if turtle.detect() then
        turtle.dig()
    end
    if not turtle.forward() then
        sleep(0.1)
        mineForward()
    end
end

local function mineUp()
    if turtle.detectUp() then
        turtle.digUp()
    end
    if not turtle.up() then
        sleep(0.1)
        mineUp()
    end
end

local function mineDown()
    if turtle.detectDown() then
        turtle.digDown()
    end
    if not turtle.down() then
        sleep(0.1)
        mineDown()
    end
end

local function turnLeft() repeat until turtle.turnLeft() end
local function turnRight() repeat until turtle.turnRight() end

for z = 1, depth do
    mineForward()
    turnLeft()
    for y = 1, height - 1 do
        if turtle.detect() then
            turtle.dig()
        end
        mineUp()
    end
    if turtle.detect() then
        turtle.dig()
    end
    turnRight()
    mineForward()
    turnLeft()
    if turtle.detect() then
        turtle.dig()
    end
    for y = 1, height - 1 do
        mineDown()
        if turtle.detect() then
            turtle.dig()
        end
    end
    turnRight()
end