Examples for flashing lights

# AlmAct1 - switch to activate the alarm in Room1
# AlmSnd1 - switch for a buzzer

automation:
- alias: 'Alarm_PIR_Room1'
  trigger:
    platform: state
    entity_id: binary_sensor.PIR1
    to: 'on'
  condition:
    - condition: state
      entity_id: switch.AlmAct1
      state: 'on'
    - condition: state
      entity_id: script.alarm_room1
      state: 'off'
  action:
    # start alarm on movement if alarm activated
    # and the alarm is not triggered
    service: script.turn_on
    entity_id: script.alarm_room1

- alias: 'flash_room1_start'
  trigger:
    platform: state
    entity_id: switch.AlmSnd1
    to: 'on'
  action:
    service: script.turn_on
    entity_id: script.flash_room1

- alias: 'flash_room1_stop'
  trigger:
    platform: state
    entity_id: switch.REL1
    to: 'off'
  condition:
    condition: state
    entity_id: switch.AlmSnd1
    to: 'off'
  action:
    service: script.turn_off
    entity_id: script.flash_room1

script:
  alarm_room1:
    alias: Alarm room1
    sequence:
      - alias: Alarm Room1 Start
        service: homeassistant.turn_on
        data:
          entity_id: switch.AlmSnd1
      - alias: Set Ack Room1
        service: homeassistant.turn_on
        data:
          entity_id: input_boolean.ack1
      - alias: email_Room1
        service: notify.email
        data:
          message: 'Movement alarm in Room1'
      - delay:
          # time interval for alarm sound and light flashing
          seconds: 60
      - alias: Alarm Room1 Stop
        service: homeassistant.turn_off
        data:
          entity_id: switch.AlmSnd1

  flash_room1:
    alias: Flash Room1 On
    sequence:
      - alias: Light Room1 On
        service: homeassistant.turn_on
        data:
          entity_id: switch.REL1
      - delay:
          # time for flash light on
          seconds: 1
      - alias: Light Room1 Off
        service: homeassistant.turn_off
        data:
          entity_id: switch.REL1
      - delay:
          # time for flash light off
          seconds: 1
      - alias: loop_room1
        service: script.turn_on
        data:
          entity_id: script.flash_room1