#include <Adafruit_NeoPixel.h>

#define LED_PIN    22     // Pin connected to the data input of the LED ring
#define NUM_LEDS   16     // Number of LEDs in the ring

Adafruit_NeoPixel ring(NUM_LEDS, LED_PIN, NEO_GRB + NEO_KHZ800);

void setup() {
  // Initialize the LED ring
  ring.begin();
  ring.show();  // Initialize all pixels to 'off'
  Serial.begin(115200);  // Start serial communication
}

void loop() {
  // Example 1: Color wipe effect
  colorWipe(ring.Color(255, 0, 0), 50);  // Red color wipe
  delay(500);
  colorWipe(ring.Color(0, 255, 0), 50);  // Green color wipe
  delay(500);
  colorWipe(ring.Color(0, 0, 255), 50);  // Blue color wipe
  delay(500);

  // Example 2: Rainbow effect
  rainbow(20);  // Display rainbow with a delay of 20ms between frames
  delay(500);
}

// Fill the entire ring with one color, one pixel at a time
void colorWipe(uint32_t color, int wait) {
  for (int i = 0; i < ring.numPixels(); i++) {
    ring.setPixelColor(i, color);
    ring.show();
    delay(wait);
  }
}

// Fill the ring with a moving rainbow
void rainbow(int wait) {
  int firstPixelHue = 0;  // Start at 0 degrees of hue
  for (int i = 0; i < ring.numPixels(); i++) {
    int pixelHue = firstPixelHue + (i * 65536L / ring.numPixels());
    ring.setPixelColor(i, ring.ColorHSV(pixelHue));
  }
  ring.show();
  delay(wait);
  firstPixelHue += 256;  // Increment the hue for the next frame
}