#include "FastLED.h"                                          // FastLED library.

// Fixed definitions cannot change on the fly.
#define LED_PIN 2                                             // Data pin to connect to the strip.
#define NUM_LEDS 13                                           // Number of LED's.
#define kier_L 3
#define BEAT_RATE   60

struct CRGB leds[NUM_LEDS];                                   // Initialize our LED array.
#define LED_PIN     6
#define NUM_LEDS    10
#define BRIGHTNESS  100
#define FADE_DELAY  30
#define SPEED       1
#define BEAT_RATE   60
uint8_t b_wave = 0;             //sinus do roznych rzeczy
uint32_t starting_millis;       //zmienna do zerowania sinusa
uint8_t bpm = 60;               //tempo kierunkowskazu
uint16_t period = (60/bpm)*1000;              //ile trwa okres w [ms]

bool one_cycle = 0;
bool high = 0;
uint8_t beat;
void setup() {

  Serial.begin(115200);                                        // Initialize serial port for debugging.
  delay(100);                                                // Soft startup to ease the flow of electrons.
  pinMode(kier_L, INPUT);
  
  FastLED.addLeds<WS2812B, LED_PIN, GRB>(leds, NUM_LEDS);
  FastLED.clear(true);

  beat = beatsin8(BEAT_RATE, 0, 255); // Generate beat value using beatsin8()

}

void loop() {

  if (digitalRead(kier_L))
  {
    // Wandering light effect
    for (int i = 0; i < NUM_LEDS + 4; i++) {
      // Update LEDs
      for (int j = 0; j < NUM_LEDS; j++) {
        // Calculate brightness based on distance from wandering light
        int distance = abs(j - i);
        int brightness = constrain(255 - distance * 60 + beat, 0, 255); // Add beat effect

        // Apply fade in and fade out effect
        if (distance < 3) {
          brightness = map(distance, 0, 2, 0, brightness);
        }

        // Set LED color
        leds[j] = CRGB(brightness, brightness, brightness);
      }

      // Show updated LEDs
      FastLED.show();
    }
  }
}