int pinVolt=A5;
int redPin=4;
int bluePin=3;
int pinkPin=2;
int readVal;
float Volt;
void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  pinMode(redPin, OUTPUT);
  pinMode(bluePin, OUTPUT);
  pinMode(pinkPin, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  readVal=analogRead(pinVolt);
  Volt=(5./1023)*readVal;
  Serial.println(Volt);

  if(Volt<1.5){
    digitalWrite(redPin, HIGH);
    digitalWrite(bluePin, LOW);
    digitalWrite(pinkPin, LOW);
  }
  else if(Volt<3){
    digitalWrite(bluePin, HIGH);
    digitalWrite(redPin, LOW);
    digitalWrite(pinkPin, LOW);
  }
  else{
    digitalWrite(pinkPin, HIGH);
    digitalWrite(redPin, LOW);
    digitalWrite(bluePin, LOW);
  }
  
}