/*
 * Created by ArduinoGetStarted.com
 *
 * This example code is in the public domain
 *
 * Tutorial page: https://arduinogetstarted.com/tutorials/arduino-neopixel-led-strip
 */

#include <Adafruit_NeoPixel.h>
#ifdef __AVR__
#include <avr/power.h>  // Required for 16 MHz Adafruit Trinket
#endif

#define PIN_NEO_PIXEL D5  // Arduino pin that connects to NeoPixel
#define NUM_PIXELS 4    // The number of LEDs (pixels) on NeoPixel

#define DELAY_INTERVAL 200  // 250ms pause between each pixel

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();  // set all pixel colors to 'off'. It only takes effect if pixels.show() is called

  // turn pixels to green one by one with delay between each pixel
  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
  }

  // turn off all pixels for two seconds
  NeoPixel.clear();
  NeoPixel.show();  // send the updated pixel colors to the NeoPixel hardware.
  delay(500);      // off time

  // turn on all pixels to red at the same time for two seconds
  for (int pixel = 0; pixel < NUM_PIXELS; pixel++) {           // for each pixel
    NeoPixel.setPixelColor(pixel, NeoPixel.Color(255, 0, 0));  // it only takes effect if pixels.show() is called
  }
  NeoPixel.show();  // send the updated pixel colors to the NeoPixel hardware.
  delay(1000);      // on time

  // turn off all pixels for one seconds
  NeoPixel.clear();
  NeoPixel.show();  // send the updated pixel colors to the NeoPixel hardware.
  delay(500);      // off time
}