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// NeoPixel test program showing use of the WHITE channel for RGBW
// pixels only (won't look correct on regular RGB NeoPixel strips).

#include 
#include 


// Which pin on the Arduino is connected to the NeoPixels?
#define LED_PIN     6 //Connect D6 on Arduino Uno to NeoPixel input (white wire)

// How many NeoPixels are attached to the Arduino?
#define LED_COUNT  30

#define BRIGHTNESS 255 // NeoPixel brightness, 0 (min) to 255 (max)




// Declare our NeoPixel strip object:


Adafruit_NeoPixel strip(LED_COUNT, LED_PIN, NEO_GRB + NEO_KHZ800);

// Argument 1 = Number of pixels in NeoPixel strip
// Argument 2 = Arduino pin number (most are valid)
// Argument 3 = Pixel type flags, add together as needed:
//   NEO_KHZ800  800 KHz bitstream (most NeoPixel products w/WS2812 LEDs)
//   NEO_GRB     Pixels are wired for GRB bitstream (most NeoPixel products)

uint32_t rgbcolor1; //variable for color of NeoPixel
uint32_t rgbcolor2; //variable for color of NeoPixel
  uint32_t hue1 = 0; //randomized hue variable for HSV (Hue, Saturation, Value)
  uint32_t hue2 = 0; //randomized hue variable for HSV (Hue, Saturation, Value)
  uint8_t saturation = 0; //initialize saturation for HSV (Hue, Saturation, Value)
//Saturation determines the intensity or purity of the color…this is an 
//8-bit number ranging from 0 (no saturation, just grayscale) 
//to 255 (maximum saturation, pure hue). In the middle,
//you’ll start to get sort of pastel tones.


  uint8_t value= 0; //Value determines the brightness of a color…
//it’s also an 8-bit number ranging from 0 (black, regardless of hue or saturation) 
//to 255 (maximum brightness).

long maxValue = 65535; //max hue value for HSV
//red (0) --> Violet (65535) in ROYGBIV order

void setup() {
  Serial.begin(9600); //begin serial communication with strip at 9600 Baude Rate
  strip.begin();           // INITIALIZE NeoPixel strip object (REQUIRED)
  strip.clear(); //clear the strip
  strip.setBrightness(BRIGHTNESS); //set brightness
  hue1 = random(0, maxValue); //
  value = 255; //set desired brightness (0-->255)
  saturation = 150; //set desired saturation (0--> 255), 150 will be pastel tones
  
  rgbcolor1 = strip.gamma32(strip.ColorHSV(hue1, saturation, value)); 
  //Strip.ColorHSV will utilize HSV color library
  //strip.gamma32 will help crispen the HSV colors. 
  //without strip.gamma32 your HSV colors may be washed out
  
  strip.fill(rgbcolor1, 0, 29); //fill the strip with the rgb color
  //from 0 (first pixel) to 29 (last pixel)
  strip.show(); //show the color
  pinMode(LED_PIN, OUTPUT); //define D6 as an output pin

}

void loop() {
  hue1 = random(maxValue/2, maxValue); //generate random hue
  value = 255; //set desired brightness (0-->255)
  saturation = random(150,255); //set desired saturation (0--> 255), 150 will be pastel tones
  
  rgbcolor1 = strip.gamma32(strip.ColorHSV(hue1, saturation, value));
    //Strip.ColorHSV will utilize HSV color library
  //strip.gamma32 will help crispen the HSV colors. 
  //without strip.gamma32 your HSV colors may be washed out


  //Loop that starts at middle of strip (LED #15)
  //and expands outward towards each edge of the strip
  //one LED at a time
  for (int i = 0; i <= 15; i++) { 
    strip.fill(rgbcolor1, 15 - i, 1);
    strip.fill(rgbcolor1, 15 + i, 1);
    //short delay so each LED illuminates individually
    delay(100); 
    //show your pretty colors!
    strip.show();
  }
    hue2 = random(0, maxValue/2); //generate random hue
  value = 255; //set desired brightness (0-->255)
  saturation = random(100,255); //set desired saturation (0--> 255), 150 will be pastel tones
  
  rgbcolor2 = strip.gamma32(strip.ColorHSV(hue2, saturation, value));
    //Strip.ColorHSV will utilize HSV color library
  //strip.gamma32 will help crispen the HSV colors. 
  //without strip.gamma32 your HSV colors may be washed out


  //Loop that starts at ends of strip (LED #15)
  //and travels inward towards strip center
  //one LED at a time
  for (int i = 15; i >= 0; i--) { 
    strip.fill(rgbcolor2, 15 - i, 1);
    strip.fill(rgbcolor2, 15 + i, 1);
    //short delay so each LED illuminates individually
    delay(100); 
    //show your pretty colors!
    strip.show();
  }



}