void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Program Started");
  pinMode(2, OUTPUT);
}
int val;
int i;
void loop() {
  // put your main code here, to run repeatedly:
  if (Serial.available()>0){
    val = Serial.parseInt();
    for (i=0; i<val; i++){
      digitalWrite(2, HIGH);
      delay(500);
      digitalWrite(2, LOW);
      delay(500);
    }
  }
}