FadeLed.txt

int led = 9;           
int brightness = 0;    
int fadeAmount = 5;    


void setup() {
  
}


void loop() {
  
  analogWrite(led, brightness);


  brightness = brightness + fadeAmount;


  if (brightness <= 0 || brightness >= 255) {
    fadeAmount = -fadeAmount;
  }
  delay(30);
}