int LEDR = 15;
int LEDG = 2;
int LEDB = 0;
int LEDY = 4;
int LEDW = 17;

void setup() {
  // put your setup code here, to run once:
  pinMode(LEDR, OUTPUT);
  pinMode(LEDG, OUTPUT);
  pinMode(LEDB, OUTPUT);
  pinMode(LEDY, OUTPUT);
  pinMode(LEDW, OUTPUT);
  Serial.begin(9600);
  Serial.println("Hello, ESP32!");
}

void loop() {
  // put your main code here, to run repeatedly:
  digitalWrite(LEDR, HIGH);
  delay(1000);
  digitalWrite(LEDR, LOW);
  delay(1000);
  digitalWrite(LEDG, HIGH);
  delay(1000);
  digitalWrite(LEDG, LOW);
  delay(1000);
  digitalWrite(LEDB, HIGH);
  delay(1000);
  digitalWrite(LEDB, LOW);
  delay(1000);
  digitalWrite(LEDY, HIGH);
  delay(1000);
  digitalWrite(LEDY, LOW);
  delay(1000);
  digitalWrite(LEDW, HIGH);
  delay(1000);
  digitalWrite(LEDW, LOW);
  delay(1000);
}