// C++ code
//
int i = 0;

void setup()
{
  pinMode(3, OUTPUT);

  i = 0;
}

void loop()
{
  while (!(i == 255)) {
    analogWrite(3, i);
    delay(100); // Wait for 100 millisecond(s)
    i += (i + 1);
  }
  i += 0;
}