#define sensor A0
#define led 3
#define led1 4
int sensorvalue = 0;
float voltage;
void setup()
{
  pinMode(led, OUTPUT);
  pinMode(led1, OUTPUT);
  pinMode(sensor, INPUT);
  Serial.begin(9600);
}

void loop()
{
  sensorvalue = analogRead(sensor);
  digitalWrite(led, sensorvalue);
  digitalWrite(led1, sensorvalue);
  voltage = sensorvalue * (5.0 / 1024);
  if ((voltage) > 2.5)
  {
    digitalWrite(led, HIGH);
  }
  else{
    if((voltage) < 2.5)
    digitalWrite(led1, HIGH);
  }
}