int led = 11,led1 = 10,led2 = 10;
void setup() {
  // put your setup code here, to run once:
  pinMode(led, OUTPUT);
  pinMode(led1, OUTPUT);
  pinMode(led2, OUTPUT);

}

void loop() {
  // put your main code here, to run repeatedly:
  while(1){
    digitalWrite(led, HIGH);
    delay(500);
    digitalWrite(led, LOW);
    delay(500);
    // firsr blink
     digitalWrite(led1, HIGH);
    delay(500);
    digitalWrite(led1, LOW);
    delay(500);
    //sec blink
     digitalWrite(led2, HIGH);
    delay(500);
    digitalWrite(led2, LOW);
    delay(500);
    // third blink
  }
}