How to make text appear on screen for 5 secs once interactign with an object

[LoneWolf]

eg. a door, i want ext to display on the door only when its locked, i also want text to display when picking up chemicals for mixing. I've asked this before but never got a proper answer.

Thanks.

Edit also i only want these things to display once, its sort of like penumbra's interacting text, but obviously not as much.