Question about the "Button" function

I am wanting to program a button to operate a relay, which in turn will run a windshield wiper motor for a specific amount of time. i.e.12 seconds.

I don't want to have to hold the button down, or have an "off" function. Is this possible?

this seem easy enough. make a button, and make the press action to "whatever 12" then add the correspond code in the "startswith" section to trigger the realy for 12 seconds