#define ledr 5
#define ledg 21
#define ledb 19

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

void loop() {
  // put your main code here, to run repeatedly:
  delay(2000); // this speeds up the simulation
  digitalWrite(ledr, HIGH);
  digitalWrite(ledg, LOW);
  digitalWrite(ledb, LOW);

  delay(2000); // this speeds up the simulation
  digitalWrite(ledr, LOW);
  digitalWrite(ledg, HIGH);
  digitalWrite(ledb, LOW);

  delay(2000); // this speeds up the simulation
  digitalWrite(ledr, LOW);
  digitalWrite(ledg, LOW);
  digitalWrite(ledb, HIGH);
}