const int redPin = 9;      
const int yellowPin = 10;  
const int greenPin = 11;   
const int potPin = A0;     
const int buttonPin = 2;   

bool originalConditions = true;
bool buttonState = HIGH;
bool lastButtonState = HIGH;
unsigned long lastDebounceTime = 0;
unsigned long debounceDelay = 50;  

void setup() {
  Serial.begin(9600);
  pinMode(redPin, OUTPUT);
  pinMode(yellowPin, OUTPUT);
  pinMode(greenPin, OUTPUT);
  pinMode(buttonPin, INPUT_PULLUP);
}

void loop() {
  int potValue = analogRead(potPin);  
  float voltage = potValue * (5.0 / 1023.0);  

  Serial.print("Vpot: ");
  Serial.print(voltage, 2);  
  Serial.println(" V");

  int reading = digitalRead(buttonPin);
  unsigned long currentTime = millis();

  if (reading != lastButtonState) {
    lastDebounceTime = currentTime;
  }

  if ((currentTime - lastDebounceTime) > debounceDelay) {
    if (reading != buttonState) {
      buttonState = reading;

      if (buttonState == LOW) {
        
        originalConditions = !originalConditions;
      }
    }
  }

  lastButtonState = reading;

  if (originalConditions) {
    
    if (voltage < 0.1) {
      digitalWrite(redPin, LOW);
      digitalWrite(yellowPin, LOW);
      digitalWrite(greenPin, LOW);
    } else if (voltage >= 1 && voltage < 2) {
      digitalWrite(redPin, HIGH);
      digitalWrite(yellowPin, LOW);
      digitalWrite(greenPin, LOW);
    } else if (voltage >= 2 && voltage < 3) {
      digitalWrite(redPin, HIGH);
      digitalWrite(yellowPin, HIGH);
      digitalWrite(greenPin, LOW);
    } else if (voltage >= 3) {
      digitalWrite(redPin, HIGH);
      digitalWrite(yellowPin, HIGH);
      digitalWrite(greenPin, HIGH);
    }
  } else {
    
    if (voltage < 0.1) {
      digitalWrite(redPin, LOW);
      digitalWrite(yellowPin, LOW);
      digitalWrite(greenPin, LOW);
    } else if (voltage >= 1 && voltage < 2) {
      digitalWrite(redPin, LOW);
      digitalWrite(yellowPin, LOW);
      digitalWrite(greenPin, HIGH);
    } else if (voltage >= 2 && voltage < 3) {
      digitalWrite(redPin, LOW);
      digitalWrite(yellowPin, HIGH);
      digitalWrite(greenPin, HIGH);
    } else if (voltage >= 3) {
      digitalWrite(redPin, HIGH);
      digitalWrite(yellowPin, HIGH);
      digitalWrite(greenPin, HIGH);
    }
  }

  delay(1000);  
}