#include <Adafruit_NeoPixel.h>
#define PIN 3
#define NUM_LEDS 150
// Parameter 1 = number of pixels in strip
// Parameter 2 = 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(NUM_LEDS, PIN, NEO_GRBW + NEO_KHZ800);

void setup() {
  strip.begin();
  strip.show(); // Initialize all pixels to 'off'
}

// *** REPLACE FROM HERE ***
void loop() {
  Twinkle(0, 0, 0, 255, 50, 0, false);
}

void Twinkle(byte red, byte green, byte blue, byte white, int Count, int SpeedDelay, boolean OnlyOne) {
  setAll(0,0,0,0);
  
  for (int i=0; i<Count; i++) {
     setPixel(random(NUM_LEDS),red,green,blue,white);
     showStrip();
     delay(SpeedDelay);
     if(OnlyOne) { 
       setAll(0,0,0,0); 
     }
   }
  
  delay(SpeedDelay);
}
// *** REPLACE TO HERE ***

void showStrip() {
 #ifdef ADAFRUIT_NEOPIXEL_H 
   // NeoPixel
   strip.show();
 #endif
 #ifndef ADAFRUIT_NEOPIXEL_H
   // FastLED
   FastLED.show();
 #endif
}

void setPixel(int Pixel, byte red, byte green, byte blue, byte white) {
 #ifdef ADAFRUIT_NEOPIXEL_H 
   // NeoPixel
   strip.setPixelColor(Pixel, strip.Color(red, green, blue, white));
 #endif
 #ifndef ADAFRUIT_NEOPIXEL_H 
   // FastLED
   leds[Pixel].r = red;
   leds[Pixel].g = green;
   leds[Pixel].b = blue;
 #endif
}

void setAll(byte red, byte green, byte blue, byte white) {
  for(int i = 0; i < NUM_LEDS; i++ ) {
    setPixel(i, red, green, blue, white); 
  }
  showStrip();
}