#include <Adafruit_NeoPixel.h>

// Pin connected to the LED strip data input (DIN)
#define LED_PIN D1      

#define TOTAL_LEDS 60    // Real number of LEDs in the strip
#define ACTIVE_LEDS 1    // LEDs you want to use

Adafruit_NeoPixel strip(TOTAL_LEDS, LED_PIN, NEO_GRB + NEO_KHZ800);

void setup() {
  strip.begin();

  // --- Turn OFF all LEDs ---
  for (int i = 0; i < TOTAL_LEDS; i++) {
    strip.setPixelColor(i, strip.Color(0, 0, 0));
  }
  strip.show();
  
  // Set brightness level (0–255)
  strip.setBrightness(25);

  // --- Turn ON only the active LEDs ---
  for (int i = 0; i < ACTIVE_LEDS; i++) {
    strip.setPixelColor(i, strip.Color(255, 0, 0)); // Red color. Change values to RGB color
  }

  strip.show();
}

void loop() {
}