const int biru=8;
const int hijau =9;
const int pink=10;
void setup() {
  pinMode(biru, OUTPUT);
  pinMode(hijau , OUTPUT);
  pinMode(pink, OUTPUT);
}

void loop() {
  digitalWrite(biru, HIGH);
  digitalWrite(hijau , LOW);
  digitalWrite(pink, LOW);
  delay(1000);
  digitalWrite(biru, LOW);
  digitalWrite(hijau , HIGH);
  digitalWrite(pink, LOW);
  delay(1000);
  digitalWrite(biru, LOW);
  digitalWrite(hijau, LOW);
  digitalWrite(pink, HIGH);
  delay(1000);


}