const int ledPin = 13;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  Serial.println("selamat datang");


  pinMode(ledPin, OUTPUT);
}

int number = 1;
void loop() {
  for (number; number < 11; number++) {
    Serial.print("angka ke : ");
    Serial.println(number);

    if (number % 2 == 0) {

      digitalWrite(ledPin, HIGH);
    } else {
      digitalWrite(ledPin, LOW);
    }

    delay(500);
  }
  Serial.println();
  delay(1000);
}