const unsigned long interval = 10000;
  unsigned long previousMillis = 0;
void setup() {
  pinMode(8, OUTPUT);
  pinMode(6, OUTPUT);
  Serial.begin(9600);
  Serial.println("Alarm pengingat makan siap!");
  // put your setup code here, to run once:

}

void loop() {
  unsigned long
  currentMillis = millis();

   if(currentMillis - previousMillis >= interval)
   {
    previousMillis = currentMillis;
    Serial.println("Jangan lupa makan ya ganteng!");
    for (int i = 0; i<5; i++){
      tone(8, 1000);
      digitalWrite(6, HIGH);
      delay (500);

      noTone(8);
      digitalWrite(6, LOW);
      delay (500);
    }
   }
  // put your main code here, to run repeatedly:

}