Arduino Simple NeoPixel Example

neopixel-simple.ino

#include <Adafruit_NeoPixel.h>

#define PIN_NEO_PIXEL  8   // Arduino pin that connects to NeoPixel
#define NUM_PIXELS     21  // The number of LEDs (pixels) on NeoPixel

#define DELAY_INTERVAL 100

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

void setup() {
  NeoPixel.begin(); // INITIALIZE NeoPixel strip object (REQUIRED)
}

void loop() {
  NeoPixel.clear();
  for (int pixel = 0; pixel < NUM_PIXELS; pixel++) { // for each pixel
    NeoPixel.setPixelColor(pixel, NeoPixel.Color(0, 255, 0)); // it only takes effect if pixels.show() is called
    NeoPixel.show();   // send the updated pixel colors to the NeoPixel hardware.
    delay(DELAY_INTERVAL); // pause between each pixel
  }
}