const int buttonBiru = 11;
const int ledBiru = 3;
int buttonAwal = 0; //kondisi awal
int buttonNext = 0; //kondisi selanjutnya
int buttonStatus = 0;

void setup() {
  // put your setup code here, to run once:
  pinMode(buttonBiru, INPUT);
  pinMode(ledBiru, OUTPUT);
  Serial.begin(9600);
}

void loop() {
  // put your main code here, to run repeatedly:
  buttonAwal = digitalRead(buttonBiru);
  if (buttonAwal != buttonNext) {
    if (buttonAwal == HIGH) {
      buttonStatus++;
    }
    delay(10);
  }
  buttonNext = buttonAwal;
  if (buttonStatus % 2 == 0) {
    digitalWrite(ledBiru, HIGH);
    } else {
      digitalWrite(ledBiru, LOW);
  }
}