int POT = A5;
float POT_Value;
#define RED 2
#define YELLOW 3
#define GREEN 4

void setup()
{
  pinMode(POT, INPUT);
  pinMode(RED, OUTPUT);
  pinMode(YELLOW, OUTPUT);
  pinMode(GREEN, OUTPUT);
  Serial.begin(9600);
}

void loop()
{
  POT_Value = analogRead(POT);
  float Voltage = (5.0 / 1023) * POT_Value;

  if (Voltage >= 0 && Voltage < 1)
  {
    digitalWrite(RED, HIGH);
    digitalWrite(YELLOW, LOW);
    digitalWrite(GREEN, LOW);
  }
  else if (Voltage >= 1 && Voltage < 2)
  {
    digitalWrite(RED, LOW);
    digitalWrite(YELLOW, HIGH);
    digitalWrite(GREEN, LOW);
  }
  else if (Voltage >= 2 && Voltage < 3)
  {
    digitalWrite(RED, LOW);
    digitalWrite(YELLOW, LOW);
    digitalWrite(GREEN, HIGH);
  }
  else if (Voltage >= 3 && Voltage < 4)
  {
    digitalWrite(RED, HIGH);
    digitalWrite(YELLOW, HIGH);
    digitalWrite(GREEN, HIGH);
  }
  else if (Voltage >= 4 && Voltage <= 5)
  {
    digitalWrite(RED, LOW);
    digitalWrite(YELLOW, LOW);
    digitalWrite(GREEN, LOW);
  }

  Serial.print("POT_Value: ");
  Serial.println(POT_Value);
  Serial.print("Voltage: ");
  Serial.println(Voltage);
  delay(1000);
}