pixel.ino

#include <Adafruit_NeoPixel.h>

#define PIN            2
#define LED_COUNT      169
#define C_MAX          50
#define DIV            100
#define DELAY          5

int r = 0; //random(0,DIV);

Adafruit_NeoPixel pixels = Adafruit_NeoPixel(LED_COUNT, PIN, NEO_RGB + NEO_KHZ800);

int delayval = 1; // delay for half a second

void setup() {
  pixels.begin(); // This initializes the NeoPixel library.
  pixels.setBrightness(C_MAX);
}
void rainbowCycle(uint8_t wait) {
  uint16_t i, j;

  for (j = 0; j < 1280; j++) { // 5 cycles of all colors on wheel
    for (i = 0; i < pixels.numPixels(); i++) {
      int x = (i % 26);
      int y = int(i / 13) + 1;
      if (x > 12) {
        x = 25 - x;
      }
      x-=5;
      y-=5;
      float step = 1. / 196;
      int u = int(x*y*step*255 + (j*2.5))%255;
      pixels.setPixelColor(i, Wheel(u));
    }
    pixels.show();
    delay(wait);
  }
}
uint32_t Wheel(byte WheelPos) {
  if (WheelPos < 85) {
    return pixels.Color(WheelPos * 3, 255 - WheelPos * 3, 0);
  } else if (WheelPos < 170) {
    WheelPos -= 85;
    return pixels.Color(255 - WheelPos * 3, 0, WheelPos * 3);
  } else {
    WheelPos -= 170;
    return pixels.Color(0, WheelPos * 3, 255 - WheelPos * 3);
  }
}
void loop() {
  rainbowCycle(DELAY);
}