//
// LED Ring demo
//
// Author: Heinz Endres, Sep-2024
//

# include "Adafruit_NeoPixel.h"
# define pinNumber 7

// number of LEDs in one ring
# define numLEDs 16
# define numLEDs2 numLEDs*2

// Delay used
# define del 50

Adafruit_NeoPixel LEDRing(numLEDs2, pinNumber, NEO_GRB + NEO_KHZ800);

void setup()
{
  // setBrightness(0..255)
  LEDRing.setBrightness(255);
  // NeoPixel Bibliothek initialisieren
  LEDRing.begin();
}

// set LED for left ring from i=0 to numLEDs-1
void setRingLeft (int i, int r, int g, int b) {
  LEDRing.setPixelColor(i, LEDRing.Color(r, g, b));
}
// set LED for right ring from i=0 to numLEDs-1
void setRingRight (int i, int r, int g, int b) {
  int k = numLEDs2-i;
  if (k == numLEDs2) k=numLEDs;
  LEDRing.setPixelColor(k, LEDRing.Color(r, g, b));
}
void setRing (int i, int r, int g, int b) {
  setRingLeft(i,r,g,b);
  setRingRight(i,r,g,b);
}
void loop()
{ 
  
  // running light
  for (int i = 0; i < numLEDs; i++) 
  {
    setRing(i,100, 100, 100);
    LEDRing.show();  
    delay(del);
  }
  for (int j = numLEDs - 1; j >= 0 ; j--) 
  {
    for (int i = 0; i <= j; i++) 
    {
      setRing(i,255, 255, 0);
      if (i > 0) setRing(i-1, 100, 100, 100);
      LEDRing.show();
      delay(del);
    }
    setRing(j,150, 150, 0);
    LEDRing.show();
    delay(del*10);
  }

}