//lampu kedipi
void setup() {
 // put your setup code here, to run once:
 pinMode(2, OUTPUT );
 pinMode(3, OUTPUT );
}

void loop() {
  // put your main code here, to run repeatedly:
digitalWrite(2, LOW ); 
digitalWrite(3, HIGH  );
delay (1000) ;
digitalWrite(3, LOW );
digitalWrite(2, HIGH  );
delay(1000) ;
}