Just press the flag.
https://www.google.com/search?q=portal+transparent+background&safe=strict&rlz=1CASQGI_enUS814&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjU94nSkOngAhUDi6wKHWBfALMQ_AUIDigB&biw=1366&bih=697#imgrc=H_QRb-y8c36QWM:
