int led1=32;
int led2=33;
void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  pinMode(led1,OUTPUT);
  pinMode(led2,OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
    digitalWrite(led1,HIGH);
    digitalWrite(led2,LOW);
    delay(3000);
    digitalWrite(led2,HIGH);
    digitalWrite(led1,LOW);
    delay(3000);
}