Just press the flag and watch. If you lag too much, the timing may be off a bit for the white flashes, but then again, it shouldn't be all that much because I used the broadcast block and didn't wait after the flag clicked for the code, so it's more flexible and less buggy.
Dont remix and not change anything FLASH WARNING! Do NOT watch if you are sensitive to flashes and rapid screen changes. 52 views and 2 people finally liked and favorited :D