#include <Adafruit_NeoPixel.h>

#define LED_PIN     2
#define NUM_LEDS    16
#define RIGHT_PIN   4
#define LEFT_PIN    5
#define TWINKLE_PIN 6

Adafruit_NeoPixel strip = Adafruit_NeoPixel(NUM_LEDS, LED_PIN, NEO_GRB + NEO_KHZ800);

void setup() {
  strip.begin();
  strip.show(); // Initialize all pixels to 'off'
  
  // Sequential orange light effect on power-up (2 times)
  for (int i = 0; i < 2; i++) {
    sequentialOrangeEffect();
  }

  pinMode(RIGHT_PIN, INPUT);
  pinMode(LEFT_PIN, INPUT);
  pinMode(TWINKLE_PIN, INPUT);
}

void loop() {
  int rightSignal = digitalRead(RIGHT_PIN);
  int leftSignal = digitalRead(LEFT_PIN);
  int twinkleSignal = digitalRead(TWINKLE_PIN);

  if (rightSignal == HIGH && leftSignal == HIGH) {
    hazardEffect(); // Hazard effect if both signals are HIGH
  } else if (rightSignal == HIGH) {
    rightSequentialEffect();
  } else if (leftSignal == HIGH) {
    leftSequentialEffect();
  } else if (twinkleSignal == HIGH) {
    twinkleEffect();
  } else {
    strip.clear();
    strip.show(); // Turn off the lights if no signal is received
  }
}

void sequentialOrangeEffect() {
  int delayTime = 50; // Adjust delay as needed
  for (int i = 0; i < NUM_LEDS / 2; i++) {
    strip.setPixelColor(NUM_LEDS / 2 - 1 - i, strip.Color(255, 165, 0)); // Left half
    strip.setPixelColor(NUM_LEDS / 2 + i, strip.Color(255, 165, 0)); // Right half
    strip.show();
    delay(delayTime);
  }
  strip.clear();
  strip.show();
}

void rightSequentialEffect() {
  int delayTime = 100; // Quick response delay
  for (int i = 0; i < NUM_LEDS / 2; i++) {
    strip.setPixelColor(NUM_LEDS / 2 + i, strip.Color(255, 165, 0)); // Right half
    strip.show();
    delay(delayTime);
  }
  strip.clear();
  strip.show();
}

void leftSequentialEffect() {
  int delayTime = 100; // Quick response delay
  for (int i = 0; i < NUM_LEDS / 2; i++) {
    strip.setPixelColor(NUM_LEDS / 2 - 1 - i, strip.Color(255, 165, 0)); // Left half
    strip.show();
    delay(delayTime);
  }
  strip.clear();
  strip.show();
}

void twinkleEffect() {
  int delayTime = 500; // Adjust twinkle speed as needed
  for (int i = 0; i < NUM_LEDS; i++) {
    if (random(4) > 1) { // Random twinkle effect
      strip.setPixelColor(i, strip.Color(255, 255, 255));
    } else {
      strip.setPixelColor(i, 0);
    }
  }
  strip.show();
  delay(delayTime);
}

void hazardEffect() {
  int delayTime = 100; // Quick response delay
  for (int i = 0; i < NUM_LEDS / 2; i++) {
    strip.setPixelColor(NUM_LEDS / 2 - 1 - i, strip.Color(255, 165, 0)); // Left half
    strip.setPixelColor(NUM_LEDS / 2 + i, strip.Color(255, 165, 0)); // Right half
    strip.show();
    delay(delayTime);
  }
  strip.clear();
  strip.show();
}