Light effects in a script (code help)

ESPHome
1

Hello! I am trying to make an ESPHome configuration where a connected light is either constantly on (when the button is not pressed) or flickering/strobing (when the button is pressed - it needs to be manually reset to become ‘unpressed’). However, I cannot figure out how to add custom light effects in a script, as I get the following error:

string value cannot be dictionary or list.

Below is my code, with the last block (-strobe and onwards) giving me the error:

esphome:
  name: esp-alarm-button-1
  platform: ESP32
  board: nodemcu-32s

wifi:
  ssid: !secret wifi_ssid
  password: !secret wifi_password
  domain: .XXXX

  # Enable fallback hotspot (captive portal) in case wifi connection fails
  ap:
    ssid: "esp alarm button 1"
    password: !secret backup_password

captive_portal:

# Enable logging
logger:

# Enable Home Assistant API
api:
  password: !secret backup_password_2
  encryption:
    key: "XXXX"

ota:
  password: !secret backup_password_2

# "The esp32_ble_tracker component creates a global hub so that you can track bluetooth low energy devices using your ESP32 node."
# https://esphome.io/components/esp32_ble_tracker.html
esp32_ble_tracker:

# Sync time with Home Assistant.
time:
  - platform: homeassistant
    id: homeassistant_time

switch:
  # Switch to restart the device.
  - platform: restart
    name: esp-alarm-button-1 Restart


light:
  - platform: binary
    internal: yes
    name: "esp alarm light 1"
    id: light_green
    restore_mode: ALWAYS_ON #Always initialize the light as ON on bootup.
    output: light_green_output
    effects:
      - strobe:
          name: "Emergency blink"
          colors:
            - state: true
              duration: 250ms
            - state: false
              duration: 250ms
output:
  - id: light_green_output
    platform: gpio
    pin:
      number: 4 #D4
      inverted: false

# Button (with automations for on and off)
binary_sensor:
  - platform: gpio
    id: alarm_button
    name: Alarm button 1
    pin:
      number: 15
      mode: INPUT_PULLUP
      inverted: false
    filters:
      # Small filter, to debounce the button press.
      - delayed_on: 1000ms
      - delayed_off: 1000ms
# Automations (call scripts)
    on_press:
      - script.execute: alarm_script
    on_release:
      - script.execute: normal_script

#Script: 1 for emergency, 1 for normal use
script:
  - id: normal_script
    then:
      - light.turn_on:
          id: light_green
  - id: alarm_script
    then:
      - light.turn_on:
          id: light_green
          effect:
            - strobe:
                colors:
                  - state: true
                    duration: 250ms
                  - state: false
                    duration: 250ms

Is it possible to either add the custom strobe values to the script, or to otherwise have the script call the previously defined custom strobe effect? If possible, it would be nice to do it all in the configuration, without an extra automation within Home Assistant.

Thank you in advance!