void setup() {
  // put your setup code here, to run once:
  pinMode(11, OUTPUT);
  pinMode(5, OUTPUT);
  pinMode(3, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
    for (int i = 0; i <= 255; i++) {
    analogWrite(3, i);
    analogWrite(5, i);
    analogWrite(11, i);
    delay(10);
    if(i == 255){
      i = 0;
    }
  }
}