#include <Adafruit_NeoPixel.h>

int numpixels = 1;
int pixelpower = 11;
int pixelpin = 12;
int swtPin = D0;
int swtStatus;

Adafruit_NeoPixel pixel(numpixels, pixelpin, NEO_GRB + NEO_KHZ800);

void setup() {
  Serial.begin(9600);
  pinMode(swtPin, INPUT);
  swtStatus = 0;

  pixel.begin();
  pinMode(pixelpower, OUTPUT);
  digitalWrite(pixelpower, HIGH);
}

void loop() {
  swtStatus = digitalRead(swtPin);
  if (swtStatus == 1)
  {
    pixel.setPixelColor(0, pixel.Color(0, 255, 0));
    pixel.show();
    delay(2000);
  }
  else
  {
    pixel.setPixelColor(0, pixel.Color(0, 0, 0));
    pixel.show();
  }
}