#define LED 18

int brightness = 0;
int fadeamount = 5;


void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");

  pinMode(LED, OUTPUT);
}

void loop() {

  analogWrite(LED,brightness);

  brightness = brightness + fadeamount;

  if(brightness <=0 || brightness >=255)
  {
    fadeamount = -fadeamount;
  }

  delay(30);
}