void setup() {
  // put your setup code here, to run once:
pinMode(13, OUTPUT);
pinMode(11, OUTPUT);

}

void loop() {
  // put your main code here, to run repeatedly:
digitalWrite(13, HIGH);
analogWrite(11, 0);
delay(400);
analogWrite(11, 70);
delay(400);
analogWrite(11, 140);
delay(400);
analogWrite(11, 200);
delay(400);
analogWrite(11, 255);
delay(400);
}