Brink frequency and stop

[#1]

I tried to blink the following box to achieve the following

1. faster its current blinking frequency (double).

2. to brink two times and stop as RED().

I am using =if(odd(second(now())),RED(),0)

[giakoum]

Note the last sentence :

now([ timer_mode])

Returns a timestamp of the current time from the system clock. The timer_mode may have the following values:

0 Time at previously finished reload (not currently ongoing reload)
1 Time at function call
2 Time when the document was opened  

Default timer_mode is 1. The timer_mode = 1 should be used with caution, since it polls the operating system every second and hence could slow down the system.