Sonoff Basic R2 with Ultrasonic Sensor

Hello

I am not sure if what I am trying to do is possible, I am trying to control the Sonoff Basic Relay (flashed with ESPhome) automatically via un ultrasonic sensor with external 5V power and both the trigger and echo pins using GPIO 1 and GPIO 3, there is no problem up to this moment and the YAML file validates, compiles and uploads fine. this is the successful YAML file under ESPhome

esphome:
  name: right_garage_door_motor
  platform: ESP8266
  board: esp01_1m

wifi:
  ssid: !secret home_wifi_ssid
  password: !secret home_wifi_password

  # Enable fallback hotspot (captive portal) in case wifi connection fails
  ap:
    ssid: "Right Garage Door Motor"
    password: "***********"

captive_portal:

# Enable logging
logger:

# Enable Home Assistant API
api:

ota:

binary_sensor:
  - platform: gpio
    pin:
      number: GPIO0
      mode: INPUT_PULLUP
      inverted: True
    name: "Right Garage Door Motor Safety Switch"
    on_press:
      - switch.toggle: fakebutton

  - platform: template
    name: "Right Door Obstacle"
    device_class: presence
    lambda: |-
      if (id(ultrasonic_sensor2).state < 1.5) {
        // Obstacle is in the way
        return true;

      } else {
        // no obstacle
        return false;
        
      }   

switch:
  - platform: template
    name: "Right Garage Door Motor"
    optimistic: true
    id: fakebutton
    turn_on_action:
    - switch.turn_on: relay
    - light.turn_off: led
    turn_off_action:
    - switch.turn_off: relay
    - light.turn_on: led
  - platform: gpio
    id: relay
    pin: GPIO12

output:
  - platform: esp8266_pwm
    id: basic_green_led
    pin:
      number: GPIO13
      inverted: True

light:
  - platform: monochromatic
    name: "Right Garage Door Safety LED"
    output: basic_green_led
    id: led
    default_transition_length: 10ms
    
sensor:
  - platform: ultrasonic
    name: "Right Door USonic"
    id: ultrasonic_sensor2
    trigger_pin: GPIO01
    echo_pin: GPIO03
    update_interval: 1s
    filters:
      filter_out: nan
    timeout: 9m
    icon: mdi:arrow-expand-horizontal

What I want to do is simply control the relay automatically (in addition to the manual control above) based on the distance returned by the ultrasonic sensor, see this section below

 - platform: template
    name: "Right Door Obstacle"
    device_class: presence
    lambda: |-
      if (id(ultrasonic_sensor2).state < 1.5) {
        // Obstacle is in the way
        return true;

         // I want to turn the RELAY OFF and the LED ON  in here //

      } else {
        // no obstacle
        return false;
      
      // I want to turn the RELAY ON and the LED OFF in here //

 
      }   

I tried many things but all fail to compile, not strangely due to my lack of this language

Can you help me out please with the commands I need to insert in the function above to achieve that

Your help will be very much appreciated

Cheers