a little controls override/rebind question

[Mito551]

hello my dear friends.

so i was kinda playing around with a thought in my head and thought of something which i would like to do, but don't know how.
the basic structure will be something like this: wenn x is done/happens, y begins, but ends after a short period of time, say 30 seconds. that y is supposed to rebind keys for these 30 seconds.
my question is simple: is it possible and how would that be possible?

any help would be greatly appreciated (and properly credited)!