down_miner.lua

local function is_number(a)
    if type(a) == "number" then
        return true
    end
    return false
end

local function init()
    if #Args == 0 or #Args == nil then
        print("No starting parameters added!\n")
        print("--down <value> | Default: " .. Down)
        print("--width <value> | Default: " .. Width)
        print("--length <value> | Default: " .. Length)
        print("\n\n Do you still want to start the Turtle with default values?\n\t- Enter: y or n")

        local input = tostring(read() or "")
        if input == nil or input:lower() ~= "y" then
            shutdown()
        end
    end
    for i = 1, #Args, 2 do
        if Args[i]:lower() == "--down" then
            if not is_number(Args[i]) then
                print("value for down is not a number, default: " .. Down .. "\n")
                break
            end
            Down = tonumber(Args[i + 1])
        elseif Args[i]:lower() == "--length" then
            if not is_number(Args[i]) then
                print("value for length is not a number, default: " .. Length .. "\n")
                break
            end
            Length = tonumber(Args[i + 1])
        elseif Args[i]:lower() == "--width" then
            if not is_number(Args[i]) then
                print("value for width is not a number, default: " .. Width .. "\n")
                break
            end
            Width = tonumber(Args[i + 1])
        end
    end
end

local function next_layer()
    while not turtle.down() do
        turtle.digDown()
    end
    turtle.turnLeft()
end

local function dig_width()
    for i = 1, Width, 1 do
        while not turtle.forward() do
            turtle.dig()
        end
    end
    turtle.turnLeft()
    turtle.turnLeft()
    for i = 1, Width, 1 do
        while not turtle.forward() do
            turtle.dig()
        end
    end
    turtle.turnLeft()
end

local function next_line()
    while not turtle.forward() do
        turtle.dig()
    end
    turtle.turnLeft()
end

local function reset_turtle()
    turtle.turnLeft()
    turtle.turnLeft()
    for i = 1, Length - 1, 1 do
        while not turtle.forward() do
            turtle.dig()
        end
    end
    turtle.turnLeft()
    turtle.turnLeft()
end

local function start()
    for i = 1, Down, 1 do
        term.clear()
        print("Current Layer: " .. i)
        next_layer()
        for e = 1, Length, 1 do
            dig_width()
            if e ~= Length then
                next_line()
            end
        end
        reset_turtle()
    end
end

Args = {...}
Down = 3
Length = 10
Width = 10

init()
start()