#include <Adafruit_NeoPixel.h>

// Define where the sensor, the button and the led are connected
#define sensorPin A0
#define startPin 2
#define ledPin 3

#define pixelNum 8
Adafruit_NeoPixel pixels(pixelNum, ledPin, NEO_GRB + NEO_KHZ800);

void setup() {
  // Start serial console for debugging purpose
  Serial.begin(115200);
  delay(200);
  while(!Serial) {}

  // Initialize the state of the microcontroller pins
  pinMode(sensorPin, INPUT);
  pinMode(startPin, INPUT_PULLUP); 



  pixels.begin();
}

void loop() {
  pixels.clear();
  int color = 255;


    for(int i=0; i<pixelNum; i++){

     pixels.setPixelColor(i, pixels.Color(0, color, 0));  //green

     pixels.show();
     delay(250);
   }
    for(int i=0; i<pixelNum; i++){

     pixels.setPixelColor(i, pixels.Color(color, color, 0));  //yellow

     pixels.show();
     delay(250);
   }
    for(int i=0; i<pixelNum; i++){

     pixels.setPixelColor(i, pixels.Color(color, 0, 0));  //red

     pixels.show();
     delay(250);
   }

  
}