const int lampuMerah = 13;
const int lampukuning = 12;
const int lampuHijau = 11;
const int tombol = 7;

void setup() {
  //put your setup code here, to rul
  pinMode(tombol, INPUT);
  pinMode (lampuMerah, OUTPUT);
  pinMode (lampukuning, OUTPUT); 
  pinMode (lampuHijau, OUTPUT);
}

void loop() {
  // put your main code here, to run
  int button = digitalRead(tombol);
  if (button==HIGH){
   digitalWrite(lampukuning, HIGH);
   delay (3000);
   digitalWrite(lampukuning, LOW);
   digitalWrite(lampuMerah, HIGH);
   delay (5000);
   digitalWrite(lampukuning, HIGH);
   delay (2000);
   digitalWrite(lampuHijau, HIGH);
   digitalWrite(lampukuning, LOW);
   digitalWrite(lampuMerah, LOW);
   delay (3000);
   digitalWrite(lampuHijau, LOW);
  }
}