// TwinkleRockforLloyd.INO

#include <Adafruit_NeoPixel.h>

#define PIN 13
#define Pixels 40

// Parameter 1 = number of pixels in strip
// Parameter 2 = Arduino pin number (most are valid)
// Parameter 3 = pixel type flags, add together as needed:
//   NEO_KHZ800  800 KHz bitstream (most NeoPixel products w/WS2812 LEDs)
//   NEO_KHZ400  400 KHz (classic 'v1' (not v2) FLORA pixels, WS2811 drivers)
//   NEO_GRB     Pixels are wired for GRB bitstream (most NeoPixel products)
//   NEO_RGB     Pixels are wired for RGB bitstream (v1 FLORA pixels, not v2)
Adafruit_NeoPixel strip = Adafruit_NeoPixel(Pixels, PIN, NEO_GRB + NEO_KHZ800);

// IMPORTANT: To reduce NeoPixel burnout risk, add 1000 uF capacitor across
// pixel power leads, add 300 - 500 Ohm resistor on first pixel's data input
// and minimize distance between Arduino and first pixel.  Avoid connecting
// on a live circuit...if you must, connect GND first.

float redStates[Pixels];
float blueStates[Pixels];
float greenStates[Pixels];
float fadeRate = 0.99; // 0.96
long randDelay;


void setup() {
  randomSeed(analogRead(A3));
  strip.begin();
  strip.show(); // Initialize all pixels to 'off'
  strip.setBrightness(241); // 20

  for(uint16_t l = 0; l < Pixels; l++) {
    redStates[l] = 0;
    greenStates[l] = 0;
    blueStates[l] = 0;
  }
}


void loop () { // !!! TRY THIS PART FOR MORE PIXLES !!!
    if (random(3) == 1) { // 3 , 20
      uint16_t i = random(Pixels);
      if (redStates[i] < 1 && greenStates[i] < 1 && blueStates[i] < 1) {
          redStates[i] = random(256);
          greenStates[i] = random(256);
          blueStates[i] = random(256);
         }
      }
    
    for(uint16_t l = 0; l < Pixels; l++) {
      if (redStates[l] > 1 || greenStates[l] > 1 || blueStates[l] > 1) {
        strip.setPixelColor(l, redStates[l], greenStates[l], blueStates[l]);
        
        if (redStates[l] > 1) {
          redStates[l] = redStates[l] * fadeRate;
        } else {
          redStates[l] = 0;
        }
        
        if (greenStates[l] > 1) {
          greenStates[l] = greenStates[l] * fadeRate;
        } else {
          greenStates[l] = 0;
        }
        
        if (blueStates[l] > 1) {
          blueStates[l] = blueStates[l] * fadeRate;
        } else {
          blueStates[l] = 0;
        }
        
      } else {
        strip.setPixelColor(l, 0, 0, 0);
      }
    }
    strip.show();
    randDelay = (11,55);
    delay(randDelay); // 20  
}