int ledPin = 10;
void setup() {
  // put your setup code here, to run once:
 pinMode(ledPin, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
 digitalWrite(ledPin, HIGH);
 delay(1000);
 //LED hidup selama 1 detik
 digitalWrite(ledPin, LOW);
 delay(1000);
 //LED mati selama 1 detik
 
}