int led1 = 7; 
int led2 = 6;
int led3 = 5;
int pb1 = 4;
int pb2 = 3;
int nomor = 1;

void setup() {
  // put your setup code here, to run once:
  pinMode(led1, OUTPUT);
  pinMode(led2, OUTPUT);
  pinMode(led3, OUTPUT);
  pinMode(pb1, INPUT);
  pinMode(pb2, INPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  int statusButton1 = digitalRead(pb1);
  int statusButton2 = digitalRead(pb2);
 
  if (nomor == 1){
    digitalWrite(led1, HIGH);
    digitalWrite(led2, LOW);
    digitalWrite(led3, LOW);
  }
  if (nomor == 2){
    digitalWrite(led1, LOW);
    digitalWrite(led2, HIGH);
    digitalWrite(led3, LOW);
  }
  if (nomor == 3){
    digitalWrite(led1, LOW);
    digitalWrite(led2, LOW);
    digitalWrite(led3, HIGH);
  }

  if(statusButton1 == HIGH){
    if(nomor <3){
      nomor++;
    } else {
      nomor = 1;
    }
  }
  
  if(statusButton2 == HIGH){
    if(nomor >1){
      nomor--;
    } else {
      nomor = 3;
    }
  }

  delay(200);

  }