Quarrybuilder

    local s = 1 -- Slot numer

    function place()
            if turtle.detectDown() == true then
                    turtle.digDown()
                    turtle.placeDown()
            else
                    turtle.placeDown()
            end
    end

    function forward()
            if turtle.detect() == true then
                    repeat
                            turtle.dig()
                    until turtle.detect() == false
                    turtle.forward()
            else
                    turtle.forward()
            end
    end

    turtle.select(s)

    term.write("Wie lange soll eine Zaunseite sein: ")
    local length = read()-1


    print()
    write("ben�B6tige Z�A4une: ")
    print(length*4)
    print("Bitte in Slot 16 einen Zaun extra legen!")

    if turtle.getFuelLevel() >= length then
            print()
     print("Treibstoff Ok")
            print()
            term.write("Zum Starten - go - eintippen: ")
            local start = read()
            if start == "go" then
                    for j = 0, 3, 1 do
                            for i = 1, length, 1 do
                                    if turtle.getItemCount(s) >= 1 and turtle.compareTo(16) == true then
                                            place()
                                            forward()
                                    else
                                            repeat
                                            s = s + 1
                                                    turtle.select(s)
                                            until turtle.compareTo(16) == true
          place()
                                             forward()
                                    end
                            end
                            turtle.turnRight()
                    end
      term.clear()
      print("Fertig")
            else
                    print("falsche Eingabe")
            end
    else
            print()
     print("zu wenig Treibstoff! Bitte erst nachladen!")
    end