select to relay

input_select:
  ventilation_state:
    name: Ventilation state
    options:
      - First state
      - Second state
      - Third state
      - Fourth state
    icon: mdi:fan

automation:
  alias: ventilation_set_state
  trigger:
    - platform: state
      entity_id: input_select.ventilation_state
  action:
    - choose:
      - conditions: '{{trigger.to_state.state == "Third state"}}'
        sequence:
          - service: light.turn_on
            entity_id: light.first_relay, light.second_relay
      - conditions: '{{trigger.to_state.state == "Second state"}}'
        sequence:
          - service: light.turn_on
            entity_id: light.second_relay
          - service: light.turn_off
            entity_id: light.first_relay
      - conditions: '{{trigger.to_state.state == "Fourth state"}}'
        sequence:
          - service: light.turn_on
            entity_id: light.first_relay
          - service: light.turn_off
            entity_id: light.second_relay
      default:
        service: light.turn_off
        entity_id: light.first_relay, light.second_relay