Recreate Winter Wonderland Light Effect with Home Assistant, without Philips Hue

winter_wonderland.yaml

alias: Winter Wonderland Light Effect
triggers:
  - trigger: time_pattern
    seconds: /4
    id: cycle
  - trigger: state
    entity_id: input_boolean.winter_wonderland
    to: "on"
    id: toggle_on
  - trigger: state
    entity_id: input_boolean.winter_wonderland
    to: "off"
    id: toggle_off
actions:
  - choose:
      - conditions:
          - condition: or
            conditions:
              - condition: trigger
                id: toggle_on
              - condition: and
                conditions:
                  - condition: trigger
                    id: cycle
                  - condition: state
                    entity_id: input_boolean.winter_wonderland
                    state: "on"
        sequence:
          - repeat:
              count: 21
              sequence:
                - action: light.turn_on
                  target:
                    entity_id: >
                      {% set lights = [
                        'light.house_downlight_1_light', 'light.house_downlight_2_light',
                        'light.house_downlight_3_light', 'light.house_downlight_4_light',
                        'light.house_downlight_5_light', 'light.house_downlight_6_light',
                        'light.house_downlight_7_light', 'light.house_downlight_8_light',
                        'light.house_downlight_9_light', 'light.house_downlight_10_light',
                        'light.house_downlight_11_light',
                        'light.sun_room_downlight_1_light', 'light.sun_room_downlight_2_light',
                        'light.sun_room_downlight_3_light', 'light.sun_room_downlight_4_light',
                        'light.sun_room_downlight_5_light', 'light.sun_room_downlight_6_light',
                        'light.sun_room_downlight_7_light', 'light.sun_room_downlight_8_light',
                        'light.sun_room_downlight_9_light', 'light.sun_room_downlight_10_light'
                      ] %} {# We use repeat.index (1-based) minus 1 to get
                      0-based index #} {{ lights[repeat.index - 1] }}
                  data:
                    transition: 3
                    brightness: >
                      {% set step = (now().timestamp() / 4) | int %} {# Use
                      (repeat.index - 1) to match the light position #} {% set
                      idx = (repeat.index - 1) | int %} {{ 255 if (idx + step) %
                      2 == 0 else 60 }}
                    rgb_color: >
                      {% set step = (now().timestamp() / 4) | int %} {% set idx
                      = (repeat.index - 1) | int %}

                      {# Re-define palette here so it can never be lost #} {%
                      set palette = [
                        [255, 204, 170], [255, 182, 193], [255, 192, 203],
                        [221, 160, 221], [230, 230, 250], [176, 224, 230],
                        [173, 216, 230], [135, 206, 250], [0, 191, 255],
                        [240, 248, 255], [224, 255, 255], [200, 240, 230]
                      ] %}

                      {% set col_idx = (idx + (step // 3)) % 12 %} {{
                      palette[col_idx] }}
      - conditions:
          - condition: trigger
            id: toggle_off
        sequence:
          - action: light.turn_off
            target:
              entity_id: light.house_downlights
            data:
              transition: 1
mode: restart