int delay_time;

void setup()
{
  pinMode(13, OUTPUT);
  pinMode(12, OUTPUT);
  pinMode(11, OUTPUT);

  pinMode(A0, INPUT);

  Serial.begin(9600);
}

void loop()
{

    delay_time = analogRead(A0); // read the value from A0 pin
    
    Serial.print("input value:");
    Serial.println(delay_time); // print the value being read from A0 pin

   	digitalWrite(13, HIGH); // turn led on pin 31 ON
   	delay(1000);            // wait
    digitalWrite(13, LOW);  // turn led on pin 31 OFF
	  delay(1000);            // wait
  
} // end void loop