#include <Adafruit_NeoPixel.h>
 
#define PIN         4 //Pino de entrada no fita de leds
#define NUMPIXELS   3 //Quantidde de pixels
#define SW_PIN      2 // Pino da chave seletora (modo falha)
 
//Cria um pixel
Adafruit_NeoPixel np1p = Adafruit_NeoPixel(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800);
 
void setup()
{
  //Inicializa a serial
  Serial.begin(9600);  
  //Initicializa a bilbioteca NeoPixel
  np1p.begin();
  //Limpa a cor
  np1p.fill(0x000000, 0, 1); //Cor, Primeiro, Quantidade
  //Atualiza o pixel
  np1p.show();
  //Escreve uma cor
  np1p.setPixelColor(0, 0xAA, 0x0F, 0xF0); //RGB

  pinMode(SW_PIN, INPUT_PULLUP);    
}
void loop()
{

  // Verifica seletora e inicia amarelo piscante
  while(!digitalRead(SW_PIN))
  {
    np1p.fill(0x000000, 0, 3);
    np1p.show();
    delay(500);

    np1p.setPixelColor(1, 0xFFFF00);
    np1p.show();
    delay(500);
  }

  // Sinal vermelho
  np1p.setPixelColor(0, 0xFF0000);
  np1p.setPixelColor(1, 0x000000);
  np1p.setPixelColor(2, 0x000000);
  np1p.show();
  delay(3000);

  // Sinal verde
  np1p.setPixelColor(0, 0x000000);
  np1p.setPixelColor(1, 0x000000);
  np1p.setPixelColor(2, 0x00FF00);
  np1p.show();
  delay(3000);

  // Sinal amarelo
  np1p.setPixelColor(0, 0x000000);
  np1p.setPixelColor(1, 0xFFFF00);
  np1p.setPixelColor(2, 0x000000);
  np1p.show();
  delay(1000);

}