flashing_lights.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://github.com/myGithub-Markus/home-assistant_blueprints/blob/main/flashing_lights.yaml
  input:
    activated:
      name: Sensor
      description: "Sensor to activate or deactivate flashing lights."
      selector:
        entity:
    activated_states:
      name: States to match with activated sensor (optional)
      description: "A comma separated list of activated states."
      default: "on"
    activated_timeout:
      name: (OPTIONAL) activated timeout
      description: "Max time to leave flashing light during activated sensor state is true. '0' means no timeout is defined."
      default: 0
      selector:
        number:
          min: 1
          max: 3600
          unit_of_measurement: seconds
    light_target:
      name: Light
      description: "To using 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            
    scene_target:
      name: Scene
      default: scene.none
      description: "To using scene"
      selector:
        entity:
          domain: scene
    delay:
      name: (OPTIONAL) Delay
      description: "Delay flashing lights"
      default: 1000
      selector:
        number:
          min: 0
          max: 20000
          unit_of_measurement: milliseconds

mode: single
max_exceeded: silent

trigger:
  - platform: state
    entity_id: !input activated

variables:
  activated: !input activated
  activated_states_str: !input activated_states
  activated_states: "{{ activated_states_str.split(',') | map('trim') | list }}"
  activated_timeout: !input activated_timeout
  delay: !input delay
  scene_target: !input scene_target

condition: []

action:
  - service: scene.create
    data:
      scene_id: all_lights_snapshot
      snapshot_entities: >
        {{ states.light | map(attribute='entity_id') | join(',') }}
  - choose:
      - conditions:
          - "{{ scene_target == 'scene.none' }}"
        sequence:
          - service: light.turn_on
            target: !input light_target
            data:
              color_name: !input color_rgb
              brightness: !input brightness_rgb
          - delay:
            milliseconds: 1000
          - repeat:
              while:
                - condition: template
                  value_template: >
                    {% set time_now = as_timestamp(now()) %}
                    {% set activated_last_changed = float(states[activated].last_changed.timestamp(),0) %}
                    {% set is_timed_out = false %}
                    {% if activated_timeout > 0 %}
                    {% set is_timed_out = (time_now - activated_last_changed) > activated_timeout %}
                    {% endif %} 
                    {% set activated_state = 'unknown' %}
                    {% if activated is defined %}
                    {% set activated_state = states(activated) %}
                    {% endif %} 
                    {{ activated_state in activated_states and not is_timed_out }}
              sequence:
                - delay:
                    milliseconds: >
                      {{ delay }}
                - service: light.toggle
                  target: !input light_target
          - service: scene.turn_on
            data:
              entity_id: scene.all_lights_snapshot
      - conditions:
          - "{{ scene_target != 'scene.none' }}"
        sequence:
          - repeat:
              while:
                - condition: template
                  value_template: >
                    {% set time_now = as_timestamp(now()) %}
                    {% set activated_last_changed = float(states[activated].last_changed.timestamp(),0) %}
                    {% set is_timed_out = false %}
                    {% if activated_timeout > 0 %}
                    {% set is_timed_out = (time_now - activated_last_changed) > activated_timeout %}
                    {% endif %} 
                    {% set activated_state = 'unknown' %}
                    {% if activated is defined %}
                    {% set activated_state = states(activated) %}
                    {% endif %} 
                    {{ activated_state in activated_states and not is_timed_out }}
              sequence:
                - service: scene.turn_on
                  entity_id: !input scene_target
                - delay:
                    milliseconds: >
                      {{ delay }}
                - service: light.turn_off
                  target: !input light_target
                - delay:
                    milliseconds: >
                      {{ delay }}
          - service: scene.turn_on
            data:
              entity_id: scene.all_lights_snapshot