// Source: https://github.com/s-marley/FastLED-basics

#include <FastLED.h>

#define NUM_LEDS  100
#define LED_PIN   2
#define COOLING   0
#define SPARKING 0
#define DIRECTION 0

CRGB leds[NUM_LEDS];

void setup() {
  FastLED.addLeds<WS2812B, LED_PIN, GRB>(leds, NUM_LEDS);
  FastLED.setBrightness(50);
}




void loop() {
  fireEffect();
  FastLED.show();
  delay(50); // Adjust the speed of the fire effect by changing the delay value
}

void fireEffect() {
  static byte heat[NUM_LEDS];

  // Step 1. Cool down every cell a little
  for (int i = 0; i < NUM_LEDS; i++) {
    heat[i] = qsub8(heat[i], random8(0, ((COOLING * 10) / NUM_LEDS) + 2));
  }

  // Step 2. Heat from each cell drifts 'up' and diffuses a little
  for (int k = NUM_LEDS - 1; k >= 2; k--) {
    heat[k] = (heat[k - 1] + heat[k - 2] + heat[k - 2]) / 3;
  }

  // Step 3. Randomly ignite new 'sparks' near the bottom
  if (random8() < SPARKING) {
    int y = random8(7);
    heat[y] = qadd8(heat[y], random8(160, 255));
  }

  // Step 4. Map from heat cells to LED colors
  for (int j = 0; j < NUM_LEDS; j++) {
    CRGB color = HeatColor(heat[j]);
    int pixelnumber;
    if (DIRECTION == 0) {
      pixelnumber = j;
    } else {
      pixelnumber = (NUM_LEDS - 1) - j;
    }
    leds[pixelnumber] = color;
  }
}