#include <Adafruit_NeoPixel.h>

#define PIN 7
#define NUMPIXELS 16

Adafruit_NeoPixel pixels = Adafruit_NeoPixel(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800);

void setup() {
  pixels.begin();
  Serial.begin(9600);
}

void loop() {
  if (Serial.available() > 0) {
    char command = Serial.read();
    if (command == 'L') {
      arcoiris();
    } else if (command == 'O') {
      apagar();
    }
  }
}

void arcoiris() {
  for (int i = 0; i < NUMPIXELS; i++) {
    pixels.setPixelColor(i, Wheel(map(i, 0, NUMPIXELS-1, 0, 255)));
  }
  pixels.show();
}

void apagar() {
  for (int i = 0; i < NUMPIXELS; i++) {
    pixels.setPixelColor(i, pixels.Color(0, 0, 0));  // Apagar todos los NeoPixels
  }
  pixels.show();
}

uint32_t Wheel(byte WheelPos) {
  WheelPos = 255 - WheelPos;
  if(WheelPos < 85) {
    return pixels.Color(255 - WheelPos * 3, 0, WheelPos * 3);
  }
  if(WheelPos < 170) {
    WheelPos -= 85;
    return pixels.Color(0, WheelPos * 3, 255 - WheelPos * 3);
  }
  WheelPos -= 170;
  return pixels.Color(WheelPos * 3, 255 - WheelPos * 3, 0);
}