flashing.yaml

blueprint:
  name: flashing lights
  description: 'Flashing lights via on off and delay and finally restore the previous
    light states.

    '
  domain: automation
  source_url: https://community.home-assistant.io/t/simple-flashing-lights-via-on-off-and-delay-restore-previous-light-states/258099
  input:
    activated:
      name: Activated
      description: Enter the Entity Name for Trigger (On-Off)
      selector:
        entity:
          domain: input_boolean
    target_lights:
      name: Lights
      description: To flashing lights
      selector:
        target:
          entity:
            domain: light
    color_rgb:
      name: RGBColor
      description: Choose the color for blinking lights
      selector:
        select:
          options:
            - white   
            - red
            - green
            - lime
            - blue
            - navy
            - yellow
            - orange
            - turquoise
            - violet
            - magenta
            - aliceblue
            - antiquewhite
            - aquamarine
            - aqua
            - cadetblue
            - coral
            - cornflowerblue
            - crimson
            - darkblue
            - darkorange
            - darkorchid
            - darksalmon
            - darkslategray
            - deeppink
            - darkviolet
            - deepskyblue
            - ghostwhite
            - gold
            - lawngreen
            - lightcoral
            - lightgreen
            - lightseagreen
    brightness_rgb:
      name: (OPTIONAL) Light Brightness
      description: Color Brigthness between 0 to 255
      selector:
        number:
          min: 0
          max: 255
          unit_of_measurement: RGB
          step: 1.0
          mode: slider
    delay:
      name: (OPTIONAL) Delay
      description: Delay flashing lights
      default: 1000
      selector:
        number:
          min: 0.0
          max: 20000.0
          unit_of_measurement: milliseconds
          step: 1.0
          mode: slider
mode: restart
max_exceeded: silent
trigger:
- platform: state
  entity_id: !input 'activated'
  to: 'on'
variables:
  activated: !input 'activated'
  delay: !input 'delay'
  target_lights: !input 'target_lights'
condition: []
action:
- service: scene.create
  data:
    scene_id: all_lights_snapshot
    snapshot_entities: "{% set lights = states.light\n  | map(attribute='entity_id')\
      \ | join(',') %}\n  {{lights}}\n"
- service: light.turn_on
  target: !input 'target_lights'
  data:
    color_name: !input 'color_rgb'
    brightness: !input 'brightness_rgb'
- repeat:
    while:
    - condition: template
      value_template: '{{ activated == none or is_state(activated, ''on'') }}'
    sequence:
    - delay:
        milliseconds: '{{ delay }}'
    - service: light.toggle
      target: !input 'target_lights'
- service: scene.turn_on
  data:
    entity_id: scene.all_lights_snapshot