int ledMerah =2;
int ledUngu =3;
int ledBiruMuda =4;
void setup() {
pinMode (ledMerah, OUTPUT);
pinMode (ledUngu, OUTPUT);
pinMode (ledBiruMuda, OUTPUT);
}
void loop () {
digitalWrite(ledMerah, HIGH);
delay(1000);
digitalWrite(ledMerah, LOW);

digitalWrite(ledUngu, HIGH);
delay(1000);
digitalWrite(ledUngu, LOW);

digitalWrite(ledBiruMuda, HIGH);
delay(1000);
digitalWrite(ledBiruMuda, LOW);
}