#include <Adafruit_NeoPixel.h>

#define NEW_PIXEL_PIN 7
#define NUMPIXELS 48 // number of neo pixels

char state = '2';

Adafruit_NeoPixel pixels(NUMPIXELS, NEW_PIXEL_PIN, NEO_GRB + NEO_KHZ800);

void setup() {
  Serial.begin(9600);
  pixels.begin();
  pixels.setBrightness(50);
  pixels.clear();
}

void loop() {
  if (Serial.available() > 0) {
    state = Serial.read();
  }
  if (state == '0') {
    Serial.println("Code is incorrect!");
    state = '2';
    set_neo_pixel(false);
    set_neo_pixel(false);
    set_neo_pixel(false);
  } else if (state == '1') {
    Serial.println("Code is correct!");
    state = '2';
    set_neo_pixel(true);

    //    =========================
    //    Implement the follwing lines according to instuctions
    //    =========================
  }
}

void set_neo_pixel(bool debug) {
  if (debug) {
    pixels.fill(pixels.Color(0, 0, 255), 0, 48);
  } else {
    pixels.fill(pixels.Color(255, 0, 0), 0, 48);
  }
  pixels.show();
  delay(500);
  pixels.clear();
  delay(500);
}