Miningv5

local function mine(x)
    local counter = 0
    repeat
        turtle.dig()
        moveForward(1)
        turtle.digUp()
        counter = counter + 1
    until counter == x
end

local function turnAround()
    turtle.turnRight()
    turtle.turnRight()
end

function moveForward(x)
    for i = 1, x, 1 do
        if turtle.forward() then
            -- nichts passiert
        else
            if turtle.detect() then
                while(turtle.detect()) do
                    turtle.dig()
                end
                moveForward(1)
            else
                os.shutdown()
            end
        end
    end
end

local function placeTorch()
    turtle.up()
    turtle.select(2)
    turtle.back()
    turtle.place()
    turtle.down()
end

local function stripMine(x, placeTorches)
    for i = 1, x, 1 do
        mine(3)
        if i % 2 == 1 and placeTorches then
            turtle.back()
            placeTorch()
            moveForward(2)
        end

        turtle.turnRight()
        mine(8)
        if placeTorches then
            placeTorch()
        else
            turtle.back()
        end

        turnAround()
        moveForward(7)
        mine(8)
        if placeTorches then
            placeTorch()
        else
            turtle.back()
        end

        turnAround()
        moveForward(7)
        turtle.turnLeft()
        for j=1, 16, 1 do
            local slot = turtle.getItemDetail(j)
            if slot ~= nil then
                if slot["name"] == "minecraft:cobblestone" then
                    turtle.select(j)
                    turtle.drop()
                end
            end
        end
    end
end

local function calculateFuel(numberOfCorridors)
    return (numberOfCorridors * 40) + (6 * math.ceil(numberOfCorridors / 2))
end

local function calculateTorches(numberOfCorridors)
    local additionalTorches = math.ceil(numberOfCorridors / 2)
    return (numberOfCorridors * 2) + additionalTorches
end

local function printWithConfirmation(string)
    print(string)
    local input = read()
    if input ~= "y" and input ~= "yes" then
        os.shutdown()
    end
end

print("Ultimate Miner by KingKevin23")
print("How many corridors should be mined?")
local numberOfCorridors = tonumber(read())
print("Should I place torches? (y/n)")
local placeTorches = read() == "y"
local fuelNeeded = calculateFuel(numberOfCorridors) - turtle.getFuelLevel()
if fuelNeeded > 0 then
    printWithConfirmation("Please provide " .. math.ceil(fuelNeeded / 80) .. " coal items in slot 1. \n Alternatively you can manually fuel with " .. math.ceil(fuelNeeded / 1000) .. " lava!")
end

if placeTorches then
    printWithConfirmation("Please provide " .. calculateTorches(numberOfCorridors) .. " torches in slot 2.")
end
turtle.select(1)
turtle.refuel()
stripMine(numberOfCorridors, placeTorches)