i try so many options with pmc ,with timer...feal big idiot but such simple work cant do (actualy can do but its not stable always stack some where)
thanks
in advance

what are you referring to when you indicate output?  In any case probably works best if you write in the screen PLC coding.. you should be able to either change the color or make one image disappear and one appear, and then reverse. 

i mean very simple reqwest
blink the output like the buton blink on screnn
as you know we can control very easy the rate of any buton ,how long blink ...
but when this  screen buton attach to output the output not blink ,its always on
thanks

it needs to be done in code... there is no other means as far as I know.