RGBW LEDs with Arduino

rgbw-leds.ino

#include <Adafruit_NeoPixel.h>

#define LED_PIN 3
#define LED_COUNT 163
#define DELAYVAL 25
int i=0;

Adafruit_NeoPixel pixels(LED_COUNT, LED_PIN, NEO_GRBW + NEO_KHZ800);

void setup() {
  pixels.begin();
}

void loop() {
  pixels.clear();

  for (int j=0; j<10; j++) {
    int index = (i+j) % LED_COUNT;
    pixels.setPixelColor(index, pixels.Color(0, 0, 0, 255));
  }

  pixels.show();
  
  delay(DELAYVAL);
  
  if (++i>=LED_COUNT) i=0;
}