Which widget to use for controlling multiple relays

I’m totally newbie to Blynk and I would like to write a small app that controls 4 relays with 2 buttons, so that first button sets 0 to four digital pins at once and the second button sets 1 to the same digital pins. The digital pins would then be used to control the associated relays.
If understand correctly, the widget button can control one digital pin only - push or switch - but in my case I would need to set 4 digital pins at once.
Which widget to use best in such a case?

Thank you

Study the docs on virtual pins.

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