#include <Adafruit_NeoPixel.h>
#define LED_PIN   18
#define LED_COUNT 16

Adafruit_NeoPixel ledRing (LED_COUNT, LED_PIN, NEO_GRB + NEO_KHZ800);


void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32-S2!");

 pinMode (LED_PIN, OUTPUT);
 ledRing.begin();  // initialize WS2812B strip object (REQUIRED)

}

void loop() {
  // put your main code here, to run repeatedly:
ledRing.clear();

 for (int pixel = 0; pixel < LED_COUNT; pixel++) {         // for each pixel
    ledRing.setPixelColor(pixel, ledRing.Color(255, 0, 0));  // it only takes effect if pixels.show() is called
    ledRing.show();                                          // update to the WS2812B Led Strip
    delay(100);  // 500ms pause between each pixel
  }

  delay(500); // this speeds up the simulation
}