I might be a total idiot asking this but I'v been sitting here for a half an houer now and can't find what i'm looking for...

So my question is can u make a custom texture trigger by a certain % of my targets health and the to dissapear after a certain amount of seconds say 4sec?
All i can find now is trigger on status health and that gives me the option to show it at the % i want but the hide thing dosen't work even to i put it on a % of health even... i just want it timed that all can u do that at all? Please help!