int pin = 11 ,  t1 = 500 , t2 = 300 , t = 100;

void setup()
{
  pinMode(pin,OUTPUT);
}

void loop()
{
 noise(); 

}
void noise(){
  digitalWrite(pin,HIGH);
  delay(t1);
  digitalWrite(pin,LOW);
  delay(t);
  
  digitalWrite(pin,HIGH);
  delay(t1);
  digitalWrite(pin,LOW);
  delay(t);
  
  digitalWrite(pin,HIGH);
  delay(t2);
  digitalWrite(pin,LOW);
  delay(t);
}