unsigned long previousMillisBuz = 0;
unsigned long currentMillisBuz = millis();

unsigned long previousMillisRot = 0;
unsigned long currentMillisRot = millis();
unsigned long previousMillisLED = 0;
unsigned long currentMillisLED = millis();

const long intervalBuz = 3000;
const long intervalRot = 8000;
const long intervalLED = 5000;
const int ledRot =  2; 
const int Buzzer =  8;
 
void setup(){
  pinMode(LED_BUILTIN, OUTPUT);
  pinMode(ledRot, OUTPUT);
   pinMode(Buzzer, OUTPUT);
}
 
void loop(){

  unsigned long currentMillisBuz =millis();  
  if(currentMillisBuz - previousMillisBuz >= intervalBuz){
       previousMillisBuz = currentMillisBuz;
   tone(8, 100, 300); // Plays 262Hz tone for 0.250 seconds
   //noTone(Buzzer); 
  }
    //tone(8, 100, 300); // Plays 262Hz tone for 0.250 seconds
  
  
  
  unsigned long currentMillisRot =millis();  
  if(currentMillisRot - previousMillisRot >= intervalRot){
       previousMillisRot = currentMillisRot;
    digitalWrite(ledRot, HIGH);
  }




 unsigned long currentMillisLED = millis();
  if (currentMillisLED - previousMillisLED >= intervalLED){
    previousMillisLED = currentMillisLED;
    digitalWrite(LED_BUILTIN, !digitalRead(LED_BUILTIN));
  }
}