int LedPin = 6;
int bright = 0;
int fade = 5;

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

void loop() {
  analogWrite(LedPin, bright);
  
  bright = bright + fade;

  if (bright <= 0 || bright >= 255) {
    fade = - fade;
  }
  delay(30);

  
  
  
}