#include <Adafruit_NeoPixel.h>

#define PIN        6 
#define NUMPIXELS  1 

Adafruit_NeoPixel pixel(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800);

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

void loop() {
  // Red
  pixel.setPixelColor(0, pixel.Color(255, 0, 0));
  pixel.show();
  delay(1000);

  // Green
  pixel.setPixelColor(0, pixel.Color(0, 255, 0));
  pixel.show();
  delay(1000);

  // Blue
  pixel.setPixelColor(0, pixel.Color(0, 0, 255));
  pixel.show();
  delay(1000);

  // Yellow (Red + Green)
  pixel.setPixelColor(0, pixel.Color(255, 255, 0));
  pixel.show();
  delay(1000);
}