const int pb_on = 11; //pb hijau
const int pb_off = 12; //pb merah
const int led1 = 8; // led biru
const int led2 = 9; //led kuning
int state_pbon;
int state_pboff;
unsigned long hitung_milis = 0;
unsigned long milis_now;
const unsigned long jeda_milis = 3000;


void setup() {
  Serial.begin(9600);
  pinMode(pb_on, INPUT);
  pinMode(pb_off, INPUT);
  pinMode(led1, OUTPUT);
  pinMode(led2, OUTPUT);
}

void loop() {
  milis_now = millis();


  if (milis_now - hitung_milis >= jeda_milis)  
  {
    digitalWrite(led1, !digitalRead(led1));  
    hitung_milis = milis_now;
    }


  state_pbon = digitalRead(pb_on);
  state_pboff = digitalRead(pb_off);
  Serial.println(state_pbon);
  Serial.println(state_pboff);
  if(state_pbon == HIGH) {
    digitalWrite(led2, HIGH);

  }
  else if(state_pboff == HIGH) {
    digitalWrite(led2, LOW);

  }

}