local torchDistance = 0 -- Distanz für Fackel
local fuelLevel = turtle.getFuelLevel() --FuelLevel
local chests = turtle.getItemCount(4) --Anzahl Chests

function ivFull()
    local full = true
        for i = 5,16 do
            if turtle.getItemCount(i) == 0 then
                full = false
            end
        end
    return full
end

function mine()
    if turtle.getFuelLevel() < 100 then
        turtle.refuel(1)
    end
end

while ivFull() == false do

    if torchDistance == 8 then
        turtle.select(2)
        turtle.turnRight()
        turtle.turnRight()
        turtle.place()
        turtle.turnLeft()
        turtle.turnLeft()
        torchDistance = 0
    end

    if turtle.detectDown() == false then
        turtle.select(3)
        turtle.placeDown()
    end

    if turtle.detect() then
        turtle.dig()
        turtle.forward()
        turtle.digUp()
        turtle.turnLeft()
        turtle.dig()
        turtle.up()
        turtle.dig()
        turtle.turnRight()
        turtle.turnRight()
        turtle.dig()
        turtle.down()
        turtle.dig()
        turtle.turnLeft()
        torchDistance = torchDistance + 1
    else
        turtle.forward()
        torchDistance = torchDistance + 1
    end

    if ivFull() == true then
        if chests > 0 then
            turtle.select(4)
            turtle.digDown()
            turtle.placeDown()
            chest = chest - 1
            for slot = 5,16 do
                turtle.select(slot)
                turtle.dropDown()
                sleep(1.5)
            end
            turtle.select(5)
        else
            print("Keine Kisten vorhanden")
            os.shutdown()
        end
    end
end

function check()
local torch = turtle.getItemCount(2)
local fuel = turtle.getItemCount(1)
local error = 0

if torch == 0 then
    print("Im Slot 2 fehlen Fackeln")
    error = error + 1

else
    print("Fackeln sind vorhanden")
end

if fuel == 0 then
    print("Es fehlt brennbares Material")
    error = error + 1
else
    print("Brennbares Material vorhanden")
end

if error == 0 then
    return true
else
    return false
end

end

function Start()
    if check() == true then
        mine()
    else
        print("Slots ueberpruefen")
    end
end

Start()