int merahPin=11;
int hijauPin=9;
int biruPin=6;
int berhenti=1000;


void setup() {
  // put your setup code here, to run once:
pinMode(merahPin, OUTPUT); 
pinMode(hijauPin, OUTPUT);
pinMode(biruPin, OUTPUT);
}

void loop() {
 // put your setup code here, to run once:
 digitalWrite(merahPin, HIGH);
delay(berhenti);
digitalWrite(merahPin, LOW);
digitalWrite(hijauPin, HIGH);
delay(berhenti);
digitalWrite(hijauPin, LOW);
digitalWrite(biruPin, HIGH);
delay(berhenti);
digitalWrite(biruPin, LOW);
}