unsigned int value;
void setup() 
{
  digitalpin_Init();
  Serial.begin(9600);
}

void loop() 
{
 main_Logic();
}
void digitalpin_Init()
{
  pinMode(A0, INPUT);
  pinMode(12, OUTPUT);
}
void main_Logic()
{
  value=analogRead(A0);
  value=(value*5/1024);
   if(value>=2)
    {
      digitalWrite(12, HIGH);
    }
    else
    {
      digitalWrite(13,LOW);
    }
    Serial.println(value);
}