Shelly to control gate using custom button card

Configuration
1

I’m using a shelly to control an electric gate all working OK. I started with trying to do it with MQTT then decided to use the inbuilt shelly integration. Then I tried via covers template but gave up. Finally decided easiest would be to use custom button-card in the dashboard.

Question is how to I add a an action/tap to the button that is showing a binary sensor at the moment, to toggle or turn on switch.driveway_gate??

type: custom:button-card
name: Driveway Gate
entity: binary_sensor.driveway_gate
state:
  - value: 'on'
    icon: mdi:gate-open
    color: red
    styles:
      card:
        - animation: blink 2s ease infinite
  - value: 'off'
    icon: mdi:gate
    color: green

Thanks