#include <Adafruit_NeoPixel.h>
Adafruit_NeoPixel pixels(16,33,NEO_GRB+NEO_KHZ800);
void setup() {
  pixels.begin();
  Serial.begin(115200);
  pinMode(4,INPUT_PULLUP);
  pinMode(33, OUTPUT);
}
void loop() {
  delay(10); // this speeds up the simulation
  pixels.clear();
  int k=digitalRead(4);
  if(k==1){ //When motion is detected
  for(int i=1;i<17;i+=3){
  pixels.setPixelColor(i,pixels.Color(255,255,255));}
  pixels.show();
  delay(500);
  pixels.clear();
  for(int i=1;i<17;i+=3){
  pixels.setPixelColor(i+1,pixels.Color(255,165,0));}
  pixels.show();
  delay(500);
  pixels.clear();
  for(int i=1;i<17;i+=3){
  pixels.setPixelColor(i+2,pixels.Color(0,255,0));}
  pixels.show();
  delay(500);}
  else{pixels.setPixelColor(0,pixels.Color(255,0,0));
  pixels.show();}//When motion is not detected
}