Single button locking?

New here and I hope this is being posted in the proper section! If not, I'm sure I'll find out the hard way lol My question: Just like a lot of Minis, Cruzes, and especially Fiestas and some Escapes (all newer models, of course) have a single button that isn't a rocker but instead a momentary button that illuminates the padlock when the doors are locked and simply turns off when pressed again to lock the doors. I know I'm going to need a number of relays to do this but does anyone have an idea of how to tackle this? I'm only powering two doors and will have the button for it all mounted in top center of the dash. Any insight toward making this work would be awesome! PS: I did do searches before posting but I don't know if a setup like that would go by any special name/term. I did think that by logic 'central locking' was what I was seeking but it turns out that's an age-old general term for those 5-wire actuators, ja?