#define LED_PIN 3
int power = 5;
bool increase = true;
void setup() {
Serial.begin(9600);
pinMode(LED_PIN, OUTPUT);
}
void loop() {
while (true) {
increase = (power == 0 || power == 250) ? !increase : increase;
analogWrite(LED_PIN, power);
power += (increase) ? 5 : -5;
Serial.println(power);
delay(100);
}
}