home-assistant.io/source/_cookbook/automation_flashing_lights.markdown
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Examples for flashing lights Automation examples for flashing lights in case of an alarm. Automation Examples

Flashing lights triggered by an alarm

For flashing regular lights in case an alarm is triggered.

# 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
    state: '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
      - alias: loop_room1
        service: script.turn_on
        data:
          entity_id: script.flash_loop

  flash_loop:
    alias: Flash loop
    sequence:
      - delay:
          # time for flash light off
          seconds: 1
      - alias: loop_room1
        service: script.turn_on
        data:
          entity_id: script.flash_room1