>>8133963
>>8133978
easy. the countdown has two parallel lines of numbers.
one is always 1 - 1 - 1 - 1 - 1
the other one is - 5 - 4 - 3 - 2 - 1 - 0
they are interlocked, one follows when the other has a pause.
1 - 5 - 1 - 4 - 1 - 3 - 1 - 2 - 1 - 1 - 1 - 0