int ledPin = 10; 


void setup() {
  // put your setup code here, to run once:
//pin 10 sebagai OUTPUT  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 } 
}