// RA: 23506 - Bárbara Brito

#include <Adafruit_NeoPixel.h>

#define NEOP_PIN 8
#define NUM_PIXELS 16
#define Delay 500

Adafruit_NeoPixel ring(
  NUM_PIXELS,
  NEOP_PIN,
  NEO_GRB + NEO_KHZ800
);

#define red ring.Color(255, 0, 0)
#define purple ring.Color(128, 0, 128) 
#define white ring.Color(255, 255, 255) 
#define pink ring.Color(255, 192, 203) 
#define preto ring.Color(0, 0, 0)

void setup() {
  ring.begin();
  ring.show(); 
}

void loop() {
  for (int i = 0; i < NUM_PIXELS; i += 3) {
    for (int j = 0; j < 3 && (i + j) < NUM_PIXELS; j++) {
      uint32_t cor;

      if ((i + j) % 4 == 0) {
        cor = purple; 
      } else if ((i + j) % 4 == 1) {
        cor = red; 
      } else if ((i + j) % 4 == 2) {
        cor = white; 
      } else {
        cor = pink; 
      }

      ring.setPixelColor(i + j, cor);
    }
    ring.show();
    delay(300); 
  }

  for (int i = 0; i < NUM_PIXELS; i++) {
    uint32_t cor;

    if (i % 4 == 0) {
      cor = purple; 
    } else if (i % 4 == 1) {
      cor = red; 
    } else if (i % 4 == 2) {
      cor = white; 
    } else {
      cor = pink; 
    }

    ring.setPixelColor(i, cor);
  }
  ring.show();
  delay(1000); 

  for (int i = 0; i < NUM_PIXELS; i++) {
    ring.setPixelColor(i, preto);
    ring.show();
    delay(100);
  }
}