#define hijau 3
#define btnhijau 12

#define biru 4
#define btnbiru 11

bool ledBiruStatus = false; 
bool tombolBiruLastState = HIGH; 

void setup() {
  pinMode(btnbiru, INPUT_PULLUP);
  pinMode(biru, OUTPUT);
}

void loop() {  
  if (digitalRead(btnbiru) == LOW && tombolBiruLastState == HIGH) {
    delay(50); 
    if (digitalRead(btnbiru) == LOW) {
      ledBiruStatus = !ledBiruStatus; 
    }
  }
  digitalWrite(biru, ledBiruStatus ? HIGH : LOW);
  tombolBiruLastState = digitalRead(btnbiru);  
}