const int redPin = D0;
const int analogPin = A1;
const int yellowPin = D2;
const int greenPin = D3;
const int greenPin = D3; 
const int timedelay = 1;
#define BUFFER_SIZE 60

int buffer[BUFFER_SIZE];
int bufferIndex = 0;
int sum = 0;
float mean = 0;
float stdDev = 0;
int threshold = 1000;

void setup() {
  Serial.begin(9600);

  pinMode(redPin, OUTPUT);
  pinMode(analogPin, INPUT);
  pinMode(yellowPin, OUTPUT);
  pinMode(greenPin, OUTPUT);
  memset(buffer, 0, sizeof(buffer));
}

void loop() {
  int analogValue = analogRead(analogPin);

  Serial.println(analogValue);
  Serial.prinln(threshold);

  if (Serial.available() > 0) {
    int newThreshold = Serial.parseInt();
    if (newThreshold > 0) {
      threshold = newThreshold;
    }
  }
  int threshold = 1000;
  int timedelay = 100;
  if (abs(analogValue - 1750) > threshold) {
    digitalWrite(redPin, HIGH);
    delay(timedelay);
    digitalWrite(redPin, LOW);
  }
  else if (abs(analogValue - 1750) > threshold) {
    digitalWrite(yellowPin, HIGH);
    delay(timedelay);
    digitalWrite(yellowPin, LOW);
  }
  else if (abs(analogValue - 1750) > threshold) {
    digitalWrite(greenPin, HIGH);
    delay(timedelay);
    digitalWrite(greenPin, LOW);
  }
}