#include <Adafruit_NeoPixel.h>
#ifdef __AVR__
#include <avr/power.h> // Required for 16 MHz Adafruit Trinket
#endif

// Which pin on the Arduino is connected to the NeoPixels?
// On a Trinket or Gemma we suggest changing this to 1:
#define LED_PIN  1

// How many NeoPixels are attached to the Arduino?
#define LED_COUNT 5

// 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_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)
//   NEO_RGBW    Pixels are wired for RGBW bitstream (NeoPixel RGBW products)


// setup() function -- runs once at startup --------------------------------

void setup() {
  // These lines are specifically to support the Adafruit Trinket 5V 16 MHz.
  // Any other board, you can remove this part (but no harm leaving it):
#if defined(__AVR_ATtiny85__) && (F_CPU == 16000000)
  clock_prescale_set(clock_div_1);
#endif
  // END of Trinket-specific code.

  strip.begin();           // INITIALIZE NeoPixel strip object (REQUIRED)
  strip.show();            // Turn OFF all pixels ASAP
  strip.setBrightness(50); // Set BRIGHTNESS to about 1/5 (max = 255)
}


// loop() function -- runs repeatedly as long as board is on ---------------

void loop() {
  redPulse(30); // Red

  greenPulse(30); // green

  bluePulse(30); // blue

  colorWipe(strip.Color(  255,   0, 0), 300); // red

  colorWipe_r(strip.Color(  0, 255,   0), 300); // Green

  colorWipe(strip.Color(0,   0,   255), 300); // Blue

  rainbow(50);             // Flowing rainbow cycle along the whole strip
}


// Some functions of our own for creating animated effects -----------------

// Fill strip pixels one after another with a color. Strip is NOT cleared
// first; anything there will be covered pixel by pixel. Pass in color
// (as a single 'packed' 32-bit value, which you can get by calling
// strip.Color(red, green, blue) as shown in the loop() function above),
// and a delay time (in milliseconds) between pixels.

void colorWipe(uint32_t color, int wait) {
  for (int i = 0; i < strip.numPixels(); i++) { // For each pixel in strip...
    strip.setPixelColor(i, color);         //  Set pixel's color (in RAM)
    strip.show();                          //  Update strip to match
    delay(wait);                           //  Pause for a moment
  }
}

void colorWipe_r(uint32_t color, int wait) {
  for (int i = strip.numPixels() + 1; i > 0; i--) { // For each pixel in strip...
    strip.setPixelColor(i - 1, color);   //  Set pixel's color (in RAM)
    strip.show();                          //  Update strip to match
    delay(wait);                           //  Pause for a moment
  }
}

void redPulse(int wait) {
  for (int c = 0; c < 255; c++) {
    for (int i = 0; i < strip.numPixels(); i++) { // For each pixel in strip...
      strip.setPixelColor(i, c, 0, 0);     //  Set pixel's color (in RAM)
      strip.show();                          //  Update strip to match
    }
    delay(wait);
  }

  for (int c = 255; c > 0; c--) {
    for (int i = 0; i < strip.numPixels(); i++) { // For each pixel in strip...
      strip.setPixelColor(i, c, 0, 0);     //  Set pixel's color (in RAM)
      strip.show();                          //  Update strip to match
    }
    delay(wait);
  }
}

void greenPulse(int wait) {
  for (int c = 0; c < 255; c++) {
    for (int i = 0; i < strip.numPixels(); i++) { // For each pixel in strip...
      strip.setPixelColor(i, 0, c, 0);     //  Set pixel's color (in RAM)
      strip.show();                          //  Update strip to match

    }
    delay(wait);
  }
  for (int c = 255; c > 0; c--) {
    for (int i = 0; i < strip.numPixels(); i++) { // For each pixel in strip...
      strip.setPixelColor(i, 0, c, 0);     //  Set pixel's color (in RAM)
      strip.show();                          //  Update strip to match
    }
    delay(wait);
  }
}

void bluePulse(int wait) {
  for (int c = 0; c < 255; c++) {
    for (int i = 0; i < strip.numPixels(); i++) { // For each pixel in strip...
      strip.setPixelColor(i, 0, 0, c);     //  Set pixel's color (in RAM)
      strip.show();                          //  Update strip to match

    }
    delay(wait);
  }
  for (int c = 255; c > 0; c--) {
    for (int i = 0; i < strip.numPixels(); i++) { // For each pixel in strip...
      strip.setPixelColor(i, 0, 0, c);     //  Set pixel's color (in RAM)
      strip.show();                          //  Update strip to match
    }
    delay(wait);
  }
}



// Rainbow cycle along whole strip. Pass delay time (in ms) between frames.
void rainbow(int wait) {
  // Hue of first pixel runs 5 complete loops through the color wheel.
  // Color wheel has a range of 65536 but it's OK if we roll over, so
  // just count from 0 to 5*65536. Adding 256 to firstPixelHue each time
  // means we'll make 5*65536/256 = 1280 passes through this outer loop:
  for (long firstPixelHue = 0; firstPixelHue < 5 * 65536; firstPixelHue += 256) {
    for (int i = 0; i < strip.numPixels(); i++) { // For each pixel in strip...
      // Offset pixel hue by an amount to make one full revolution of the
      // color wheel (range of 65536) along the length of the strip
      // (strip.numPixels() steps):
      int pixelHue = firstPixelHue + (i * 65536L / strip.numPixels());
      // strip.ColorHSV() can take 1 or 3 arguments: a hue (0 to 65535) or
      // optionally add saturation and value (brightness) (each 0 to 255).
      // Here we're using just the single-argument hue variant. The result
      // is passed through strip.gamma32() to provide 'truer' colors
      // before assigning to each pixel:
      strip.setPixelColor(i, strip.gamma32(strip.ColorHSV(pixelHue)));
    }
    strip.show(); // Update strip with new contents
    delay(wait);  // Pause for a moment
  }
}