LED fading

1.
void setup() {
  pinMode(9, OUTPUT);
  for(int j=0; j<7; j++){
    for(int i=255; i>=0; i--){
      analogWrite(9, i);
      delay(30);
    }
  }
}

void loop() {
  // put your main code here, to run repeatedly:

}

2.
void setup() {
  for(int i=255; i>=0; i--){
    analogWrite(9, i);
    tone(2, i+500, 30);
    delay(30);
  }
  for(int i=0; i<=255; i++){
    analogWrite(9, i);
    tone(2, i+500, 30);
    delay(30);
  }
}

void loop() {
  // put your main code here, to run repeatedly:

}