---

#define LED1_PIN 3
#define LED2_PIN 5

void setup()
{
  pinMode(LED1_PIN, OUTPUT);
  pinMode(LED2_PIN, OUTPUT);
}

void loop()
{
  for (int i = 0; i <= 31; i++)
  {
    analogWrite(LED1_PIN, i);
    analogWrite(LED2_PIN, 255 - (224 * i / 31));
    delay(5000 / 31);
  }
}