int pr;
void setup() {
  Serial.begin(9600);
  pinMode(3, OUTPUT);
  pinMode(A2, INPUT);
  // put your setup code here, to run once:

}

void loop() {
  Serial.println("enter a number ");
  // Serial.println(pr);
  while (Serial.available() == 0) {
  }
  pr = Serial.parseInt();
  Serial.print("the number is  ");
  Serial.println(pr);
  // if (pr == 2){
  //   digitalWrite(3, HIGH);
  // }
  // else{
  //   digitalWrite(3, LOW);
  // }
  for(int i = 0; i< pr ; i++){
    digitalWrite(3 , HIGH);
    delay(500);
    digitalWrite(3 , LOW);
    delay(500);
  }



}