//neopixel-fastled-fire.ino
//https://gist.github.com/rahulbot/1e80f24154fe3a03eca254f98b4596d8

#include <FastLED.h>
#define PIN_NEO_PIXEL  5   // Arduino pin that connects to NeoPixel
#define PIN_NEO_PIXEL2 6   // Arduino pin that connects to NeoPixel
#define NUM_LEDS  60

CRGB leds[NUM_LEDS];
CRGB leds2[NUM_LEDS];

void setup() { 
  FastLED.addLeds<NEOPIXEL, PIN_NEO_PIXEL>(leds, NUM_LEDS); 
  FastLED.addLeds<NEOPIXEL, PIN_NEO_PIXEL2>(leds2, NUM_LEDS); 
             }

void loop() {
  Fire(55,120,15);
}

void Fire(int Cooling, int Sparking, int SpeedDelay) {
  static byte heat[NUM_LEDS];
   static byte heat2[NUM_LEDS];
  int cooldown;
   int cooldown2;
  
  // Step 1.  Cool down every cell a little
  for( int i = 0; i < NUM_LEDS; i++) {
    cooldown = random(0, ((Cooling * 10) / NUM_LEDS) + 2);
    cooldown2 = random(0, ((Cooling * 10) / NUM_LEDS) + 2);

    if(cooldown>heat[i]) {
      heat[i]=0;
    } else {
      heat[i]=heat[i]-cooldown;
    }
     if(cooldown2>heat2[i]) {
      heat2[i]=0;
    } else {
      heat2[i]=heat2[i]-cooldown2;
    }
  }
  
  // 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;
    heat2[k] = (heat2[k - 1] + heat2[k - 2] + heat2[k - 2]) / 3;
  }
    
  // Step 3.  Randomly ignite new 'sparks' near the bottom
  if( random(255) < Sparking ) {
    int y = random(7);
    heat[y] =  heat[y] + random(160,255);
    heat2[y] = heat[y] + random(160,255);
  }

  // Step 4.  Convert heat to LED colors
  for( int j = 0; j < NUM_LEDS; j++) {
    setPixelHeatColor(j, heat[j] );
    setPixelHeatColor2(j, heat2[j] );
  }

  FastLED.show();
  delay(SpeedDelay);
}


void setPixel(int Pixel, byte red, byte green, byte blue) {
  // FastLED
  leds[Pixel].r = red;
  leds[Pixel].g = green;
  leds[Pixel].b = blue;
}

void setPixel2(int Pixel2, byte red, byte green, byte blue) {
  // FastLED
  leds2[Pixel2].r = red;
  leds2[Pixel2].g = green;
  leds2[Pixel2].b = blue;
}

void setPixelHeatColor (int Pixel, byte temperature) {
  // Scale 'heat' down from 0-255 to 0-191
  byte t192 = round((temperature/255.0)*191);
 
  // calculate ramp up from
  byte heatramp = t192 & 0x3F; // 0..63
  heatramp <<= 2; // scale up to 0..252
 
  // figure out which third of the spectrum we're in:
  if( t192 > 0x80) {                     // hottest
    setPixel(Pixel, 255, 255, heatramp);
  } else if( t192 > 0x40 ) {             // middle
    setPixel(Pixel, 255, heatramp, 0);
  } else {                               // coolest
    setPixel(Pixel, heatramp, 0, 0);
  }

}

void setPixelHeatColor2 (int Pixel2, byte temperature) {
  // Scale 'heat' down from 0-255 to 0-191
  byte t192 = round((temperature/255.0)*191);
 
  // calculate ramp up from
  byte heatramp = t192 & 0x3F; // 0..63
  heatramp <<= 2; // scale up to 0..252
 
  // figure out which third of the spectrum we're in:
  if( t192 > 0x80) {                     // hottest
    setPixel2(Pixel2, 255, 255, heatramp);
  } else if( t192 > 0x40 ) {             // middle
    setPixel2(Pixel2, 255, heatramp, 0);
  } else {                               // coolest
    setPixel2(Pixel2, heatramp, 0, 0);
  }

}