flash_all.yaml

######################################################################
##  Flash all the lights!
######################################################################
- alias: 'Flash all_lights'
  id: 704f77f4-dcb1-4c49-83c5-b499d9b8f678
  trigger:
    - platform: state
      entity_id: input_boolean.flash
      to: 'on'
      from: 'off'

  action:
    - service: light.turn_on
      entity_id: all
      data:
        flash: long

    - service: input_boolean.turn_off
      entity_id: input_boolean.flash

- alias: 'Flash Timer Lights'
  id: caac7e80-6f43-4029-ad40-420e70f67cd7
  trigger:
    - platform: state
      entity_id: input_boolean.flash
      to: 'on'
      from: 'off'
    - platform: event
      #Sent from IFTTT Webhooks : {"action":"Flash_Timer"}
      event_type: ifttt_webhook_received
      event_data:
        action: Flash_Timer

  action:
    - service: light.turn_on
      entity_id:
        - light.bedroom
        - light.justin_go
        - light.paige_go
        - light.sink
        - light.tv_light
        - light.couch_1
        - light.upstairs_lamp
        - light.office_lamp
        - light.slider
        - light.garage_attic
        # - light.den_lamp
      data:
        flash: long

    - service: input_boolean.turn_off
      entity_id: input_boolean.flash