#include <Adafruit_NeoPixel.h>

#define PIN_NEO_PIXEL  2   // Arduino pin that connects to NeoPixel
#define NUM_PIXELS     8  // The number of LEDs (pixels) on NeoPixel

Adafruit_NeoPixel NeoPixel(NUM_PIXELS, PIN_NEO_PIXEL, NEO_GRB + NEO_KHZ800);

struct RGB {
  int red;
  int green;
  int blue;
};

int pixel = 0;
const int maxPixel = NUM_PIXELS - 1;
int sekIndex;
int delaySec = 20;

RGB sek[] = {
  {255, 193, 0},
  {255, 154, 0},
  {255, 116, 0},
  {255, 77, 0},
  {255, 0, 0}
};

int sekCount = sizeof(sek) / sizeof(sek[0]);

void setup() {
  NeoPixel.begin();
  // put your setup code here, to run once:

}

void loop() {
  delaySec = random(66) + 20;
  // if (sekIndex >= sekCount) {
  //   sekIndex = 0;
  // }
  // sekIndex = sekIndex + 1;

  sekIndex = random(sekCount);

  pixel = random(maxPixel + 1);

  // if (pixel > maxPixel) {
  //   pixel = -1;
  // }
  // pixel = pixel + 1;

  NeoPixel.setPixelColor(pixel, NeoPixel.Color(sek[sekIndex].red, sek[sekIndex].green, sek[sekIndex].blue));
  // put your main code here, to run repeatedly:
  NeoPixel.show();
  delay(delaySec);
}