Hello and thanks for your interest in helping me out.
Let me explain a bit better what i need.
i'll have 3 computers.
computer number 1 will show a diferent image everyday (365 images/year)
computer number 2 will show a diferent image every minute (1440 images / day)
computer number 3 will show a diferent image every second during one minute (60 images / minute)
This needs to be synchonized so when the computer returns to the 0 second is the moment that the computer 2 show the image for the next minute, Does it make sense?