Help with script for fade strip led

Configuration
1

Hello,

I need a help with the following script. The idea is that when you hold down a button, the intensity of a led strip will increase and when it detects that it has reached its maximum value (255), it will decrease the intensity.

fade_the_light:
  alias: Kitchen Brightness Decrease Button
  sequence:
    - repeat:
        while:
          - condition: template
            value_template: >-
              {{ is_state('binary_sensor.touch_espejo_larga', 'on') }}
        sequence:
          - service: light.turn_on
            data_template:
              entity_id: light.luz_espejo_rgbw
              brightness: >
                {% set ct = state_attr('light.luz_espejo_rgbw', 'brightness')|int %}
                  {% if (is_state('input_boolean.prueba', 'off')) and (ct < 255) %}
                    {{ ct + 2 }}
                  {% endif %}
                  {% if ct == 255 %}
                    turn_on:
                      - service: input_boolean.toggle
                        data:
                          entity_id: input_boolean.prueba
                  {% endif %}
                   {% if (is_state('input_boolean.prueba', 'on')) and (ct  > 0) %}
                    {{ ct - 2 }}
                  {% endif %}
                  {% if ct == 0 %}
                    turn_off:
                      - service: input_boolean.toggle
                        data:
                          entity_id: input_boolean.prueba
                  {% endif %}
          - delay: 00:00:00.02