int led_red = 2;
int led_p = 4;
int led_y = 5;
int led_c = 18;

void setup() {
  pinMode(led_red, OUTPUT);
  pinMode(led_p, OUTPUT);
  pinMode(led_y, OUTPUT);
  pinMode(led_c, OUTPUT);

  Serial.begin(9600);
  Serial.println("Hello, ESP32!");
}

void loop() {
  digitalWrite(led_red, HIGH);
  delay(50);
  digitalWrite(led_red, LOW);
  delay(50);

  digitalWrite(led_p, HIGH);
  delay(100);
  digitalWrite(led_p, LOW);
  delay(100);

  digitalWrite(led_y, HIGH);
  delay(200);
  digitalWrite(led_y, LOW);
  delay(200);

  digitalWrite(led_c, HIGH);
  delay(300);
  digitalWrite(led_c, LOW);
  delay(300);

}