#define LED_hijau 13
#define LED_biru 12
#define LED_merah 11
#define tombol 7

int status = 0;
void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  pinMode(LED_hijau, OUTPUT);
  pinMode(tombol, INPUT);
  pinMode(LED_biru, OUTPUT);
  pinMode(LED_merah, OUTPUT);
  digitalWrite(LED_hijau, LOW);
  digitalWrite(LED_biru, LOW);
  digitalWrite(LED_merah, LOW);
}

void loop() {
  // put your main code here, to run repeatedly:
  if(digitalRead(tombol)==HIGH){
    status++; //nilai dalam status +1, misal:
              //status = 0, ketika tombol ditekan = 0+1 =1
              //status = 1, ketika tombol ditekan = 1+1 =2
              //dst

    delay(100);
  }
  if(status==1){
    digitalWrite(LED_hijau, HIGH);
  }
  else if(status==2){
    digitalWrite(LED_biru, HIGH);
  }
  else if(status==3){
    digitalWrite(LED_merah, HIGH);
  }
  else if(status==4){
    status = 0;
  }
  else{
    digitalWrite(LED_hijau, LOW);
    digitalWrite(LED_biru, LOW);
    digitalWrite(LED_merah, LOW);
  }
}