#define ledBiru 3
#define buttonBiru 11

int i=0;

void setup() {
  // put your setup code here, to run once:
  pinMode(ledBiru, OUTPUT);
  pinMode(buttonBiru, INPUT_PULLUP);
}

void loop() {
  // put your main code here, to run repeatedly:
  if(digitalRead(buttonBiru) == LOW){
    while(digitalRead(buttonBiru)== LOW)
    {delay(10);}
    i++;
  }
  if(i%2 == 1)
  {
    digitalWrite(ledBiru, HIGH);
  }
  else{
    digitalWrite(ledBiru, LOW);
  }
}