int led = 9;
int Brightness = 0;
void setup() {
  // put your setup code here, to run once:
pinMode(led, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
analogWrite(led, 64);
delay(1000);

analogWrite(led, 127);
delay(1000);

analogWrite(led, 191);
delay(1000);

analogWrite(led, 255);
delay(1000);

analogWrite(led, Brightness);
delay(1000);
}