Stripmine 1.12

local distance = 0
local width = 0
local direction = 0
local multi = 0
local multiCounter = 0
local torchCounter = 0
local tracker = 0
local torchSlot = 0
local buildSlot = 0

function forward(a)
    local i = 0
    while i < a do
        while turtle.detectUp() do
            turtle.digUp()
        end
        while turtle.detect() do
            turtle.dig()
        end
        if turtle.forward() then
            tracker = tracker + 1
        end
        if turtle.detectDown() == false then
            for i = 1, 16 do
                local item_data = turtle.getItemDetail(i)
                if item_data then
                    if item_data.name == "minecraft:cobblestone" then
                        buildSlot = i
                        print("New Build Slot: ", buildSlot)
                        break
                    end
                end
            end
            turtle.select(buildSlot)
            turtle.placeDown()
            turtle.select(1)
        end
        torchCounter = torchCounter + 1
        torchCheck()
        i = i+1
    end
end

function turn()
    if direction == 0 then
        turtle.turnLeft()
    elseif direction == 1 then
        turtle.turnRight()
    end
    forward(width+1)
    if direction == 0 then
        turtle.turnLeft()
        direction = 1
    elseif direction == 1 then
        turtle.turnRight()
        direction = 0
    end
end

function torchCheck()
    if torchCounter >= 11 then
        for i = 1, 16 do
            local item_data = turtle.getItemDetail(i)
            if item_data then
                if item_data.name == "minecraft:torch" then
                    torchSlot = i
                    print("New Torch Slot: ", torchSlot)
                    break
                end
            end
        end
        turtle.select(torchSlot)
        if turtle.getItemCount() >= 1 then
            turtle.turnLeft()
            turtle.turnLeft()
            turtle.place()
            torchCounter = 0
            turtle.turnLeft()
            turtle.turnLeft()
        end
        turtle.select(1)
    end
end

function checkIfFuel()
    return turtle.refuel(0)
end

function refuel()
    local fuelLimit = turtle.getFuelLimit()
    if turtle.getFuelLevel() < (fuelLimit / 8) then
        print("Fuel Limit: ", fuelLimit)
        print("Current Fuel: ", turtle.getFuelLevel())
        for i = 1, 16 do
            turtle.select(i)
            if checkIfFuel() then
                turtle.refuel()
            end
        end
    end
end

function transfer()
    if direction == 1 then
        turtle.turnLeft()
    elseif direction == 0 then
        turtle.turnRight()
    end
    while turtle.detectUp() do
        turtle.digUp()
    end
    turtle.up()

    for i = 1, multiCounter * (2 * width + 2) do
        while turtle.detect() do
            turtle.dig()
        end
        if turtle.forward() then
            tracker = tracker + 1
        end
    end
    turtle.down()

    if direction == 1 then
        turtle.turnLeft()
    elseif direction == 0 then
        turtle.turnRight()
    end
end

function checkInventory()
    empty_slots = 0
    for i = 1, 16 do
        if turtle.getItemCount(i) == 0 then
            empty_slots = empty_slots + 1
        end
    end
    if empty_slots <= 3 then
        transfer()
        clearInventory()
        transfer()
    end
end

function clearInventory()
    for i = 1, 16 do
        local item_data = turtle.getItemDetail(i)
        if item_data then
            if item_data.name ~= "minecraft:torch" then
                turtle.select(i)
                turtle.drop()
            end
        end
    end

end

function start()
    print("Starting!")
    os.sleep(2)
    print("Fuel Limit: ", turtle.getFuelLimit())
    print("Current Fuel: ", turtle.getFuelLevel())
    turtle.select(1)
    while multiCounter < multi do
        checkInventory()
        forward(distance)
        turn()
        forward(distance)
        turn()
        refuel()
        multiCounter = multiCounter + 1
    end
    transfer()
    clearInventory()
    turtle.turnLeft()
    turtle.turnLeft()
    print("Dunsoo!")
    print("I moved ", tracker, "blocks! :)")
end

print("Welcome to Voxxels Stripmining program")
print("-----------------------------------")
print("How far do you want to go?")
input1 = io.read()
distance = tonumber(input1)

print("-----------------------------------")
print("How many blocks between the tunnels?")
input2 = io.read()
width = tonumber(input2)

print("----------------------------------")
print("Left or Right?")
print("(0 = Left ; 1 = Right)")
input3 = io.read()
direction = tonumber(input3)

print("----------------------------------")
print("Ok almost done.")
print("How often should I repeat that?")
input4 = io.read()
multi = tonumber(input4)

start()